Cho hàm số \(y = f\left( x \right)\) liên tục trên...
Câu hỏi: Cho hàm số \(y = f\left( x \right)\) liên tục trên R và có đồ thị như hình bên. Phương trình \(f\left( x \right) = \pi \) có bao nhiêu nghiệm thực phân biệt?![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAARoAAAFmCAYAAACyU1UAAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2de3Ac1ZX/v9OaGc1oRo8ZPWxZko1tWRaOeVgs5uXYBpZHFnAcnmuzCxiyCbvZXbYqS1K1la2t/SNbv+z+sUuRImGTIsaQQGKXl0coQjDBAtsB/OBhB4gty5KFZGk0ljTSvKen5/fH5Fz3SKPHSNMz3T3nU5UqR1y1bnffPvecc88DqSyMjY1l+3FWchm7f//+OY/Vch65jM11fC73qJc5z2Xs22+/naqvr0/deuutqfr6+jnfpx7eYa7PzqzvkNDq/qYbv3PnzpQEhpmF/fv3495778Xu3bvxm9/8Brt378Y999yDzs7OYk+NMQgsaJhZOXz4MHbv3o1NmzYBADZt2oTdu3fj8OHDRZ4ZYxSsxZ4Ao38ef/zxKT/btGmTEDwMMxus0TAMoznWgYGBKT+MRCIIhUJzukAuYwEg29/Lx7W1nLNW96iXOZv9HeZ6fwC/w/led7rx1iVLlkz5YSAQQHV19ZwunMvYU6dOIdvfy8e1tRqb6/hc7lEvc8712kZ7h7nen9nfoVb3N9N4Np0YhtEcFjQMw2gOCxqGYTSHBQ3DMJrDgoZhGM1hQcMwjOawoGEYRnNY0DAMozksaBiG0RxrIBCY8sNcQo5zDe3O9vfycW0t56zVPeplzmZ/h7neH8DvcL7XnW68dbrw4lzCjrUay/OY/1iex/zH8jzmP3a68Ww6MQyjOSxoGIbRHBY0DMNoDgsahmE0hwUNwzCaw4KGyflUgWFyhQVNiXPu3DlYLJaM/zFMvmFBU+K88847+Id/+AekUinxP4bJNyxoSpzf/OY3+PDDD1FRUYE1a9bgo48+KvaUGBNi2b9/P29hJcr69euxdu1a7Nq1C9dccw36+/txyy234MiRI9M2h9u8eTP2799f2IkyhqanpwdYaL9d7r2diRH7NodCIfHv8vLyGcci+5LJyzz0MDaVMuY71MManW48995m0NbWJnr89Pf347rrrivyjBgzwi1xS5xnn30WW7ZsQVdXF6666iq8+OKLxZ4SY0JY0JQ411xzDU6cOAFJYuWW0Q5eXQwmJiaKPQXG5LCgYRhGc1jQMAyjOSxoGIbRHBY0DMNoDgsahmE0hwUNwzCaw+1WNBjPrTq0nwe3W1nYtbndCs8jL2N5HvMfy/OY/9jpxrPpxDCM5rCgYRhGc1jQMAyjOSxoGIbRHBY0DMNoDgsahmE0hwUNwzCaw4KGYRjNYUHDMIzmcAqCBuM5fF37eXAKwsKuzSkIPI+8jOV5zH8sz2P+Y6cbz6YTwzCaw4KGYRjNYUHDMIzmsKBhGEZzWNAwDKM5LGgYhtEcFjQMw2gOCxqGYTSHBQ3DMJrDKQgajOfwde3nwSkIC7s2pyDwPPIylucx/7E8j/mPnW48m04Mw2gOCxqGYTSHBQ3DMJrDgoZhGM1hQcMwjOawoGEYRnNY0DAMozksaBiG0RwWNAzDaA4LGoZhNIdznTQYz3ky2s+Dc50Wdm3OdeJ55GUsz2P+Y3ke8x873Xg2nRiG0RwWNAzDaA4LGoZhNIcFDcMwmsOChmEYzWFBk2dkWS72FJgFkEwmkUgkkEqlij0VU2Et9gSMTCqVwsTEBPx+P0KhEOLxOLq7u1FXV4eysjJUV1ejpqYGbrcbFoul2NOdle9///v43ve+V1IfmaIoGBsbQyAQQDAYRCKRwJkzZ/DRRx+hvLwclZWV8Hq9cLlcxZ6qoWFBM08CgQD6+/sRiUSm/DdZliHLMnw+H3w+H+x2O5YtW4aqqqoizHR2XC4Xvv/976O2trbYUykYyWQSAwMD8Pv9UBRlyn9XFAWRSASRSAQ+nw9erxdNTU2w2+1FmK3xYUGTI4qioL+/Hz6fT/z/rq4ufPrppzh37hy6u7tx8OBBrFixAsuXL0d7ezvi8ThOnTqF6upqtLS0oLy8vMh3kcl//Md/oKGhAY8++ij+9m//ttjT0ZxwOIzTp08jHo8DACKRCE6ePIk//vGPGBoawpkzZ3D8+HE0NDTg0ksvRVNTE0ZGRjA2NoZly5bB6/UW+Q6Mh2X//v2loycvEBIypMWcO3cOBw8exNDQ0LS/4/V6sXHjRjQ1NQEAJEnC4sWL4Xa7CzLnmVi6dCl+8YtfoLa2Fo8++igAwGKxIJVKobOzM+vvbN68Gfv37y/gLPPL+Pg4hoaGkEqlEIvFcOzYMZw4cUIInWy0tbXhuuuuQ0VFBYD0O62rqyvUlA1PT08PLKksBnkgEJhz2HEuYzs7O7Fp06Y5T1CreeQylsZXVVXh1KlTmJiYAAC8/vrreOuttzLU7ubmZgwNDcHhcIhxxNq1a3H33XcL82nJkiWoqKjQdM5zGT+d72g6Pw0JonzPoxBjBwYGMDg4iFQqBZ/Ph6effhqjo6NinNVqhdfrFb63aDQKIL05uFwubNu2De3t7QCAFStWwOPxaL7uiv0d5mPOzz77LJtOc6WnpwcTExNQFAWvvPIK3nnnHfHfNm/ejM2bN6OqqgrHjh1DR0cHQqEQ3nzzTbz33nuIx+M4ceIEent78eCDD2LFihUYGBiA2+3OOY8k30wWGrkKEiOQTCbR1dUlEgmPHz+OF154QQiSZcuW4ZprrsG6detgs9nEO/T5fNizZw+6urowMTGBZ555Bg899BDWrFmDnp4e3ZnAeoaPt+dAIBDAyMgIAOCll14SQsbhcODxxx/Hli1bpjh6XS4Xtm7din/5l39Ba2srAGBiYgJPPfUUjh8/DgAYHBzEwMBAAe8kO7lkYxsNWZZx6tQpcY8HDhzAs88+i2g0CkmScOutt+Kxxx7D+vXrYbPZMn63oaEBf/d3f4etW7eKa+3atQs+nw+KouD06dNIJBIFvycjwoJmFhRFwblz5wAAH374IQ4cOAAAaGpqwne+8x00NjYCAKqqqvClL30JbW1tuPjii1FTUwNJklBVVZWxWBVFwbPPPotPP/0UQNrPMzg4WIQ7y46ZtJlUKoXTp08jGo1CURT8/Oc/x969e6EoCiRJwsMPP4ybb75ZjG9pacHll1+OtrY2tLa2wmpNK/wbN27E/fffD0mSEI/H8cwzzyASiSAej6Ovr69Yt2coWNDMgt/vRzQaRTwex+uvvy5+/sgjj6CmpgZA2l5ftWoVHA4HAKCiogIrV67E2rVrUVZWBiC9WP/6r/8adrsdiqJg586dQtj09/djbGyswHdmfvr6+hAMBgEAe/bswdGjRwEAdXV1+M53voM1a9YAAOrr67Fu3To0NDSI91VdXY3LLrtMmLZXXHGFEEo+nw979+4FkHYu099gpocFzQzIsixOlN5++234/X4AwG233SaETHt7OzweT9bft9lsuPzyy8WJ07p16/Dwww/DarVClmU8//zzQticOXMma0wOMz8GBwcxPDwMADh48CDee+89AGlz6J//+Z/R0NAAi8WClpYWLF26FJKU/VNobW1FfX09AODmm2/GqlWrAABHjx7FyZMnAaT9d2bSBLWABc0MDAwMIB6PIxqNiuPeuro6XH/99QDSp0xziRhdvHixMLHa2tpw3333if/2wgsvYHx8XMTjcArDwhkfHxe+rw8//FBooh6PB48++qgIumtra0NDQ8Os12tubobT6QQAbNu2TbzzV199FYqiIBaLCaHGZIcFzTSEQiGhwbzxxhvihOIrX/kKJElCRUXFnBYpsWTJEixZsgRAWg2/++67xd95/vnnEY/HEY/HcebMGd4dFwAF46VSKfT19eGXv/wlFEWB3W7Hww8/LHxn7e3tc45lkiQJF110ESwWC2pqanDLLbcASJu8Bw8eFP/mTWJ6WNBMQ39/P1KpFPr7+3H48GEAwKpVq7Bu3ToAaS0l1/ylxsZGodlce+216OjoAAB0dXXhpZdeApDejb/44ot83UZJoSgKuru7oSgKRkZG8LOf/QzxeBySJOGBBx5AU1MTJEnC6tWrc85dqqiowOLFiwGk3x2Zw++88w4SiQQURcH58+fzfk9mgQVNFkZGRkTA3b59+8Qpxe233w4gfXRNPppcWbJkifjdr371q2LBvvfeezh06BCAtLORncO5c+bMGcRiMSiKgp/+9KfiGd50003C8bt8+XIR4ZsrixcvRnl5OSRJwg033AAgrZG+//77ACCOvZmpcBeELJw6dQrRaBSff/45jh49imQyiY6ODng8HoRCIbS0tGB8fHza35/tHr1eL/x+P2RZxvbt2/HjH/8Yo6Oj+NWvfgWHw4G2tjZ89tlnWL16tTgFMWIFfS3nMXns2NiY0ARfe+018e8rr7wS69evRzAYRFNTEywWy5zmP90Yh8OB8+fPY9WqVaitrcXAwADeeustXHrppZAkCd3d3cJ5vJD7y3U8d0FYwNhizGNiYgJWqxVutxvvvPMOrFYrHA4Hbr31VrjdbtTW1s7qm5nLPNatW4cjR46gvLwcjz32GP7f//t/kGUZL7/8Mr797W/DbrdjZGREBPvlen+5jjfyO4zH4+jt7YXb7cbJkydx+PBhWK1WLF++HPfffz/C4TBWrFiBlpaWBc+juroayWQSwWAQN910E55//nkEAgGcPn0a69atQzweR1VV1bRmtd6eXb7HTjeeTadJUARwX1+f2BXb29tFxi6ZOguFSkcAaQ3nzjvvBJAWdHv27AGQGZHMZCeVSqG3txeJRALj4+N47rnnoCgKXC4XHnzwQUiSBKfTmbf3BkBoLOvWrROhDW+++aYoLTE5z41hQZOBLMvCrqc0A0mScOONNwJIOwQnh6kvBLfbLT6Aq6++WsRonDhxQsR99Pb2IhaL5e1vmo2BgQFhxr744otCdf/KV76CqqoqlJWVYfny5dPGycwHj8cj1sKXv/xlAOm4HYoS5s1hKixoVIyMjECWZcTjcfzhD38AAFxyySWiIBRpIPlk8eLFIk/qgQceQGVlJYB0TtXY2Jg4SeEj76lEo1ERUHno0CF8/vnnAIDLL78cV199NYC08z3fxaosFoswnzs6OsT1ySk8OjqKZDKZ179pdFjQqKC4mWPHjom4GTqCrqqqmvdpxWxcdNFFKCsry1D34/E4XnjhBSiKgnA4LAptMWlSqZSIOerv7xfhAXV1dbjrrrtEntl0jtmFUl1dDYvFArvdLk60PvroI3HUzVpNJixo/kQ8HhcpAL/73e8AADU1NaL+iJaFjmw2m9CWVqxYgWuvvRZA+vSLkjgHBwc5RUGF3+9HOByGoijYu3cvZFmGJEl48MEH4XK5YLPZRJCdFlitVuH0/LM/+zMAECeVAJtPk2FB8ydIm/H5fOLf1113HWw2G+x2+7zjZuaKx+MRDuetW7cK382vf/1r+Hw+pFIp9PT0cJwGgFgsJjLq9+3bhzNnzgDIDKRbsWJFXv1p2aD3tWbNGmHyHjt2DAAQDAZnrNpXarCg+RMUV0C+GQBCJfZ6vQXpYrB06VLY7XZIkoS7774bkiRBlmXs2bNHmFB6KilRDNQCd2RkBPv27QOQ1jgpoLK+vr4gpVJrampEKYnLLrsMQLqoFjmkacNiWNAAyDSbyKFXU1ODRYsWAcg9jmC+lJWVYenSpQDSjmdK3uzq6sK7774LIG1ChcPhgsxHj/h8PlGW4ec//7kwmf7yL/8SdrsdDocjr0fZM2GxWMTauPzyywGk0yBoszJzQbFcYUGD9M6TSqXg9/uF07W9vR2SJInFWyiqq6uFSn7zzTeL/Jq33npLmFBnz54tyVMotcl0+PBhYTJt3LgRK1asAJAuXkXR1IVAXZOI8qfITxMOhzk04U9wCgLSCZThcBhHjx4VGbjt7e0IBoOoq6tDOBzOyXRaaHh3TU0NBgcHEY/HsXXrVjz11FNIJBL4xS9+ga9//etiR6cEzVyuvdCxQPHe4alTpxAKhTA8PIyXX34ZiqKgtrYW1157LYLBIOrr65FKpabML9f7A+Z+jxaLBdFoFLIsY+XKlTh27Bg++ugj/MVf/AUcDgfOnj0rjsI5BSELeg5nzufYcDgMSZJE+LrVakVdXR0uvfRSAOkkvEQiUfDn8aUvfQldXV1oa2vDhg0b8M477+Ds2bM4dOgQbr75ZoTDYTgcjhkLZJvpHQ4NDcFiscDtduPFF1+EoiiwWq24//77UVdXB6fTmZEbVsg5Nzc3w+/3Y8OGDfjkk08ApEu0XnLJJRnmldbz0MPY6caXvOlE4eJ+v1+o4m1tbQDSaQJU8KjQVFVVCRPqtttuE0GD+/btw8jIiDChSoF4PJ5RyIqqEt54441obW2FxWIRsUjFgNIQli1bJpzDp06dAgDROaPUYUHzJ0FDdjUArF69GkDahClmz+zm5mbYbDY4nU587WtfyziFAtK1a8xe2Y0C8xRFwfj4uKjV6/F4cNNNNwFIm5BaBVPOBeqtbrPZxCb1+eefQ1EUMe9Sp6QFjaIowt9x+vRpAOncJnIsFrtXttVqxUUXXQQg7WzcsGEDgPQipkC+vr4+UzscBwcHxTtS5zLdeeedwlFPp4PFQpIkEUezdu1aAGkNuaenBwC4thBKXNCEQiGRk9Ld3Q0gfWrhcrmE36bYqE2oW265RUQov/HGGwiFQqY2odRxQx9//LHQOjdv3oyVK1cCSKdv5DNhcr7Q6dNll10m5qM2n0qd4r+hIkK7o8/nE4uBUg7cbnfRbP7JNDc3w2q1wul04t5774UkSQiFQhnlP80Y8n727FlhepC5WFlZKUymhoaGnEtyaoXH44HFYoHT6RR1byiehupBlzIlLWjIdqbOkcCFaGC9LGAgnQtF1eFaW1uxfv16AOmWHx9++CGA9EdppsXs9/vFRqA2me677z44nU7Y7XZR7F0P0EYAXNisqIsGwFpNyQoatX+GTptcLpeIKtWD2aTG4/GIk6etW7eKk469e/ciEokgmUyapmtiNBoV9/Lee+8Jk+naa68VG0FjY6NuNE6C1gwJGmqhA6Dkm8yVrKAJBoMiupYWQ2trKyRJgsViKeopxnQsWbJERCvfc889woSik5ixsTFT5Nf09fVBURT4fD5hHrpcLtx2220A0nEaWie5zgfSgltaWkQ0Oa2tiYmJkozmJkpW0FBk5MjIiFBvqcJdZWWliIfQEzabTdj/7e3tuOKKKwCkTaiPP/4YQPojNbIJ5fP5hEn70ksviXu5++674XQ6YbVasWzZsqKGHUwHaTSSJKG5uRnABW05FouJGkelSMkKGkqiVMfPUAyEnvwzk6mrqxOnUFu2bBHHqnv27BEdL43aojUWi6G/vx8A8MEHH2RUzKPs6KVLl2pe/mG+2O12oQlTUfne3l7206BEc50mJiYwNDQERVFw+vRpyLIMj8cDh8MhTCr1PPWQR6Ie63a7RYO7r371q9i5cycCgQB27dqFBx54AMFgENFodM67vh7eYSqVwmeffQYAGB4exp49eyDLMiorK3HLLbcgGAyKAMpAIKDpGgXm/w4tFguCwSCWLVsm8uY++ugjrFmzBrFYLKfupnr4DjnXaQFjJyYmxM4zPDwMq9WKtrY2EeHZ2Ng4JTZDD89DPdZut6OrqwsdHR3o6enBgQMH0N3djU8//RRXX301AoFATikUxX6HlJXtdruxa9cuyLIscpkWLVoEq9WKtWvXZjiAiz3n6caGQiGsWLECbrcb0WgUX3zxBdavX49oNDpjK5Z8z6MYY6cbX5KmE0ndkZERkUNDpTQdDocuAsBmQ11O4vbbbxfO0Zdeegl+v99QJtT4+LgIzHvrrbeEA1V9yrR06VLdnTJlo6KiQqQjUHY93Y8sy6aO4p4J/X9RGkBHjXS6AVwQNHo8zZiOZcuWwW63w26349577wWAKUXNyeehV5LJJHp7e6EoCgYGBvDGG28ASPui6JSpvr5eHOfrHSr9Clzw+fl8PiQSCQAo2aJlJSloaFfp7e0FgIyqbHp2BE9GkqSMUyjKhTpz5oz4YIeGhnTbfJ4SJuPxOBRFwS9/+cuMinkUmEcnOEaB1hBtXiREgdKNpyk5QROPx8XuQoJGnS9jJEEDpDUwyn+64447xEf57rvviojn3t5eXXZQOHfunHBK7ty5U2Sib9myRSS25rv5WyFQx9MQJ06cAICSzeQ21hvMA7SjKIoizAraecrLy3UZPzMbFCBms9nwwAMPCNX9V7/6lahdo7cOCiMjI8Ivc+DAAfEhtra2Cs2sqalJdxHac4GcoS6XS5jilPgai8XEaVQpUXKChhzBJ0+eFPENy5cvB2A8bYaQJEns/HV1ddi2bRuA9L3++Mc/RjweRzgcxunTp3XhHI5Go6L5m8/nwyuvvAIgHSi5fft2UXah2OUf5kt5ebkQ9rSJqf2BpeinKTlBQxoN7TBqP4eRHMGTqaioEIv6sssuEx0U/H4/du/eDSCttpOvoFgkEglRPiESieB//ud/xA5/1113oaamBna7XdPmb4WANi06eYpGoyJgjwWNyVEURfgqKG6jsbFRxJoYVaMhvF6vCAi76aabRErF0aNH8fbbbwNIF5Kiey80audvPB7Hj370IxGWf8stt6CtrQ0WiwXLly/Pe7/sQkNrSu3IpueuR3+Z1pSUoIlGo8J0IP8MaTNWq9XwixtI+zUoGPGBBx4QwvPVV18VtXYHBgaKknx59uxZsau/8MIL+OKLLwCkS3NQjZnm5mZD+mUmQ++gublZOLOpimMpnjyVVArC8PAwgsEgAoEAfD4fFEWB1+tFMBhEZWXltHPTQ3h3LmNra2vR19eH8vJy3HfffXjmmWcgyzL+93//F9/85jfR0tKCzz77DKtWrYLT6SzIOzx79qwozvXmm2/i6NGjANKC8a677kI4HEZZWRnsdvucrq/XFAQimUwiFApBkiTU19ejv78fXV1dCAaDsFgsOH/+/KwHD3r4DjkFYR5jz58/D7fbjc8//xySJEGSJKxevRputxv19fUz/r4enkcuY9vb2+H3+7F27Vrs2LEDzz77LBRFwXPPPYd/+qd/QkNDA/r7+7Fq1Sq4XC5N3+H4+Dji8TjcbjcOHDiAd999F1arFQ0NDfibv/kbeDweOJ1OLFq0KCc/md7XXX19PcLhMJYvX46hoSGMjo6ioqJCrL25/A09rCVOQcgRcsJlC9QrVNvbQlFdXS38A5dccokoARqNRvH0008L7eL06dOaxXakUin09fWJ7p8HDhwQtXPsdjsefvhheL1eWK1WrFixwpChBTNBNWmoEmA8HsfQ0BAAlFzJiJIRNMlkUhxn08tWJ0/qsdDVQmloaBAtddevXy9C+kdHR/Gf//mfIifqzJkzQhjkC0VR0N3dLaKS33rrLVHEymq14utf/zoaGhpE14lCth0uFLSm1Bnb9JxLzSFcMoImFosJRzB5/0mbsdvtpttNiaamJhGPcv3112Pz5s0A0rvrU089hb6+PqF50L8XSjQaxYcffijajBw4cACvv/46FEWB3W7HQw89JOq1LF++XNTUMRt08kTrDIAIUmSNxqSQ2RSJRMTJB+00ZtxN1TQ3N4s0hS1btmDjxo0A0qU/n3zySVFgyufz4Q9/+MO8K/RRAB7VlQHSbWH27t0LRVHgcrnwrW99KyMj28ixS7NB68rlcgnNkp51NBrVVaS21pSMoFG3VqEXTLZzsdreFpKlS5eKY+OtW7fijjvuEJ0vd+3aJRrSxWIxHD9+HP39/Tl9CBMTE/j0009FBGwkEsGPfvQjdHZ2AkgXV3/sscfQ0tIiIpnr6+vzf6M6Qq0pUyPAc+fOQVEUpFKpkioZYU57IQskaCinBoAwKczon5kMtWo5c+YMAoEArr/+ejQ2NmLnzp1IpVLYu3cvuru7cfvtt8Pr9WJwcBCDg4NobGxETU1N1meUSqVw7tw5RKNRjI6Oip9/8MEHeOmll4R50NzcjG9+85uiMV9ra6tpzaXJUNVGtUN4ZGQEdXV1iEQiJbHJASUiaBRFEYue/DM1NTUimK3YrW8LRVlZGVpbW8VJUHt7O+644w7827/9GwKBAI4cOYLOzk781V/9FTZs2ACbzYZz587h3LlzsFqtIlXg+PHjWc2r3t5evPHGGxl1mDs6OrB9+3bY7XZIkoSVK1eWjJAB0ptYMBic4hCuq6srKT9NSQgatSOYvP5kM1utVtM6gqejpaUFFRUVOHv2LJ544gl897vfRSQSwauvvooTJ07g1VdfxZtvvomOjg5cc801aGpqysg4VguZRCKBTz/9FO+//36GgKmrq8PWrVuxdOlS2O122Gw2tLa2loT2qKa8vBzAhfUGpDe7NWvWsKAxG/RCE4mEiB+hF19qC5+ora2Fw+HA//3f/2FiYgJ2ux2RSESEyUejURw6dAiHDh0CkE4TIM3v0KFDYmxfX19GNKgkSbjppptwww03wGazIRgMwuVyYfny5eKjKyXIIVxVVQW73S76VQGllVxp2b9/f/HrBmiM3+/HyMgIzp8/jxdffBEAsGnTJqxduxbV1dWGLUeQD2RZRlNTEzo6OhCJRPCP//iP8Hq9OHTokIg3UvPxxx+L1idqrFYrLrroInR0dAgnb1lZGerr61FZWWnoTOyFoO5W+dprr6GnpwcVFRXYsWMHAJgyUHEyPT09sG7atGnKfwgEAnOOlM1lbGdnJ7L9vXxce6ax3d3dGB0dxccff4zq6mrIsoxrr70Wra2taG5unlXQaHWPWj3nXMcHg0EMDg7id7/7He677z4cOnQIt99+O3w+H44fP44zZ86gt7dXaC503ZqaGrS3t2Pp0qW47LLLhGPTYrGgrq4OjY2NCIfDmtyjls8u3++wsbERoVAIX3zxhXCaX3zxxXA6nVi1atW0PkI9fIf5WHc9PT2lYTqRikp1UCRJEnVCSsXrPx1tbW3Ys2cPLr30UlxyySVoaGhARUUFwuEwGhoacOONN4qxiqJg/fr1+N73vofKysopjdwkSRKlKkr9uaqhxNXJDuFly5aJFixmx/SCRlEU4bxU16ChEyezB+vNxnPPPbQvvbcAAB79SURBVIft27fj5MmTuPTSS7F3715cfPHFCIfDGB0dxfj4uAguo3QNavMCpIWL2+2Gx+NBTU2N6c2A+UBrTB03dO7cOSxbtqxkUhFMvyrC4fCUE6fa2loAEGUJSpmrrroKH3/88ZSeSRUVFaioqEBTUxNSqRQikYg4ebrooovEsytVZ3ou0Brzer2QJAmKoogcsFKpTWN6QUPRl+Pj48LHQDtLKZ6CZCMYDM5oh1sslgyBQoKamRuk0dhsNni9Xvj9flF4LBaLZWiLZsXcd4cLgkadnUyCptTNJqYwlJeXi1M38tOQoCmVVISSETR9fX3iZ3TKxBoNUwgkSRIaIR1CDA8Pi1wy6jNmZkwvaChTm0oX2u121miYgkOCZunSpQDS0dW0+ZVChLCpBU0ikRC7Bb1USuwDSjcqmCk8pD2ra9PQmmTTyeCoXyAFSpHZVFZWxhoNUzAorkgdAlBK1fZMLWjoBUYiEVEXl9qrsH+GKSS0qVE3UeCCQ7gUTCdTt1uh9ird3d0iaK+2tlbEhGjVcqLY7Va0vnYxW+ZoPZbQ4h2Shl1VVYUvvvgC/f39Io5mdHR0yhG3Ht4ht1uZw1i/3w+3241oNJpR6czpdM7aXiWf8yjGWJ7H/Mdqde3q6mpYrVYsW7YMJ0+exMTEhGi/YrPZsjbO08Pz4HYrs0A7yPDwsPiZx+MBwKYTU3jIT6OuTaMO3DMzphU0iqKIl0cvs6amRiQCctIfU2hoc1PnilF9JLP7aUwraCi0G7jQZ5vqtkqSxBoNU3BozZEzGLiwCc6384RRMLWgAdKaDe0aFP5tt9tLthATUzxI0LhcLlE9gNam2avtmV7QjIyMCM2GdhLWZphioI7bIu2aYmnUda3NiGkFDami6hwncsKxoGGKgSRJomQEpcGQoEmlUqbOeTKtoFFrNAQnUzLFhtYenX76/X6xKZrZIWx6QUOpB3a7XdjFLGiYYkHmk/rkiXqUs6AxILRLkEajLqNY6lX1mOJBgkZ98kQlZs0cS2PKFIREIiFym/r6+iDLMlwuF4LBICwWC+LxuGbzADgFoRDzMGIKQigUgizLCAaDsNvtojTq4OAgVq5cCUmSMgqV6+EdcgrCDGNDoRDcbjfi8ThCoZAI+3a73XC5XHC73boISddyLM9j/mO1vLbdbsfw8DDcbrdIj4nFYnC73bDZbFOupYfnwSkI05At9YDq3LJ/hikm5eXlInmS1uTg4CCAzCBTs2FKQUNONfWJEznf2D/DFBP1ETedPKnXqVkjhE0taMjJBlyobMY5TkyxUbdfAVjQGBZ6WXRs6HK5hIDhqnpMsZmc8yTLshA2Zq22VxKChlRUAFPauDJMoSFBQ2kIwIUIYdZoDIKiKCKUm3YJcrpRgSGGKSZkOtXU1Iif0VplQWMQSPWMx+Pi5dFxGzuCGT1AGk1NTY04gaIIdhY0BkFtNlFAFCVTcnsVRg+QoJEkSWyC1IvbrFncphU02Y622Wxi9EBZWZmoYU2JvhRLk0wmTZnFbboUhPPnzyMYDKK/v19oNOXl5aKRfSAQ0DScH+AUhELMw6gpCEQymUQwGITH44EsyxgcHBQdEShyWA/vkFMQphk7ODg4pfNBS0sLJEnK6Hygl5B0PT07M89Db3P2eDxIpVLwer1indrtdtjt9owUGT08D05ByAKlH5DNq3a4cfoBoxfoYKKxsVH8jAJMzVjW01SCRn20TV58da8cPnVi9AJtelTHGjB36xVTCRp14aDJMTRWq3VKJ0CGKRZlZWUAIIqxARdCM8zoDDbVl5dMJsW/JyYmAFyICmZthtETlArjdDpRWVkJ4MLJE5tOOmdy6gEA8RI5x4nRE2p/IeU8URqCLMumi6UxlaDJVpCcsrbZEczoCUmShClPCb9UFRIwX/1gUwoaMpsArkPD6BfSsunkyefzicJXZvPTmFLQUDCS1WplQcPoFopUV8edkFZjtpwnUwka2gXIqaaOoeGCV4zeoM1PLWhokzSboDFVCsLo6ChSqRR8Ph9kWYbD4UAwGIQkSRmefE5BWNi1OQUhP/OIRCJTOiL09/ejtrZWxNTM99qzwSkI8xwfj8dFTEI4HIbVasWiRYvgdrtRXl6+oOryuY7Xw1iex/zHFmoeqVQKwWAQK1asEGkIgUAAbrdbNDzUw/PgFAQVtCMAF463qbAQZ20zeoRMJ5vNJjZJOshgZ7BOIZs2kUiIo0EueMXoGfUGSJsibZLxeNxUsTSmETQkXAYGBsTPSNBwDA2jR2w2GywWC4ALa1UdbGomrcY0goZMJ3XQE7UXZUHD6JXJ9YPHxsZMGUtjGkFDppPam067BPtoGL1CQXtUbjYajYrN0kzRwaYRNCT91YKGNRpG75BGQzl5gDkdwqYRNJO7UzY0NIhgPdZoZkZds4cpLLQ21a1XyE+jPkk1OqYQNOpsV1I7yWwqKyvjOjQzcPDgQVxxxRWw2+1oa2vDb3/722JPqaTIFh1MGo2ZooNN8QWqXwiZTmQ2sTYzMzt27MCTTz6JeDyOH/7wh3jwwQeLPaWSQq3RkNChFBozVdqzFnsC+UCtYtJuwMmUc+PkyZMibPzqq6/m51Vg1HWSampq4PP5hOlkJh+NtbOzs6B/UIu/Nz4+LtpVkEYzPDyMY8eOobKyMiO2phAU+pkuFIvFgiuvvBIPPfQQnn76aXzyySei5nI2jHZ/86GQ93jy5EkA6dynQCCArq4uHDt2DEB6E9XC9C/0O7Ru2rRpyg8DgcCc8xtyGdvZ2Ylsf2+h1+7v70dXVxd8Pp8Yv27dOlxyySVobGzMaKae65xzHZ/LPWr1nHMdH4vF8Pd///f4xje+gVtvvXXW8Vq8Q72MBQr/Dj0eDxKJBP74xz9iYmICDocDHR0dCAaDuOqqq+ZUHVIPa3S68T09Peby0ah3YSomRMlqTHb27duHP//zP8d3v/vdOQkZJv+Qn4b8iuqgPbM4hE3xFZKPhno5AewMniuPPPIIzp49i1WrVomfmSnHxgjQGqVC+kC6HK3D4UA0GhVr2ciYQqMh7zwdbTscDuHUZOfmzPT29iKVSmX8jyksVJRN3eOJ6l6bxSFseEGTSqXEyyBBo94BWKOZnVwKWTH5Z7LpBGRmcZsBwwuaRCIh7FmKPyD/jCRJLGgY3UN+RHUzObOlIRhe0KglPmk0lDdit9tFGj7D6BUy710ulzjKZkGjM8gRnEgkhNChnYG1GcYIqNcpBZrSpmmWfCfDCxrqV0xd/oALTjXuTskYAbWgIW2c/GZm6VppeEFDEl/dNI5LeDJGQu1LpLWrjgkzg/lk+HYrY2NjCAaDGB0dFUKnrKwMwWBQhHTP57oLGc/tVrSfhxnaraiJxWIIh8OorKyELMvw+/1ivN/vz3AUL3QeALdbyXm8w+GA2+1GPB4X3vvGxkbY7XZ4vd5pf1+P7TfyOZbnMf+xxZhHXV0dRkZGUF9fL9axLMui9cpc/oaen53hTSdyAFODOLvdLkwmTj9gjEJZWRmAzEp7wWAQgDliaUwjaMhHo1Yx+dSJMQp0cEExYMCFlBoz1KUxtKBRFEUE69FxoLokIgsaxijMFLRnhiNuQwsatTd+aGgIALBo0SIA6RfHwXqMUcgWtEemEwuaIkOCRlEU4e0mRxTH0DBGQq190xqmkyEzHG+bQtCom8ZxLyfGiKgPLii5ktZ1IpEwfNCeKQQNpdQDF2xcPnFijIS6WwetYXVMitG1GkMLGrJds1XWY9OJMRqTy0WQjwYwvp/G0IKGjv3UjdFZo2GMCgma+vp6AGmNhrQaowsaQ6cgjIyMIBgMYmRkBMlkEpIkIZlMzph+MJ856yG8m1MQCjOWKMY7jMfjCAaDsNlskGUZyWQSPp8P9fX18Pv9M/pp9LBGZxpv6BQE6qktyzLKysrg9XpFe9e6uroZe27rPSR9oWN5HvMfW6x5eL1exONxLF68WGjkiUQCbrcbFRUVs/4dPT87Q5tOpE6S6aS+QTadGKNBa1Zd0pMOOoxuOhlW0CQSCSSTSQBT0w8sFovIHWEYo0AHGHV1deJndNDBp05FQv3gyS7kynqMkaF1K0mSEDq0tqPRaNHmlQ8MK2hImwEuaDSU58QFrxgjojb3yddollMnwwqabFHB6qLkDGM01Jo4bZrq6GAjY3hBoy7hyaYTY2TUvkXSaOigI5VKGVqrMaygoYdOxckBDtZjjA+tXRI06vVt5Lo0hhc06sAjMp2oxSjDGA0y+0nQRKNRUXOJNZoiQJX11D4aij9gjYYxKmT219bWip+R+WRkP41hBQ2pkVTu0OVysenEGB6KZlcHn9LJk5EFjWFznUZHR6EoCkZGRiDLMlwul8h2DYfDM8YdcK7Twq7NuU7azSMUCiEYDMJisYgQjuHhYXg8HoyOjqKiomLB8wA412lO41OplHjgsizDarXC4/HA7XZDkiR4PJ6CzEPPY3ke8x9bzHkkk0mMj4+LEyir1Yp4PA632w2n0znj7+v52RnSdFJrK36/H8AF5xmbTYyRoYhgl8s1JTrYyKaTIQWN2vtOzmCq4cExNIyRUW+Ukyvt8alTgVFHBdPRHx1ts0bDGBn1+iUThLR2jqMpMHS0rXY8kZrJ6QeMkZEkSdQOJj8kRb+r+5gZDUMKGnrYakHDGg1jFsj8J9NJHStmVD+NIQVNtjwncgazj4YxOrSGJ2dwAyxoCspMptNM5TsZxghQYiVp5/F4XOQ8GdVPY0hBQ0Was5lO3AaXMTqk0ajjwSgNgX00BYSkurqEJznQ2HRijM5k0wkwfiyNIVMQRkdHkUqlRPqB3W4XqmUkEplVveQUhIVdm1MQtJ1HJBLJaLsCAD6fD4sXL8b58+eFk3i+8wA4BWHW8ZTXBKQ1G6vVitraWjidTlRWVs4p/SAf89D7WJ7H/McWex6yLGNsbAw1NTVTynu63e5pr6HnZ2c40ylbrWC6MTabGDNA65j8jsAFDYQOQoyG4QSN2iyinjdUX5VjaBgzoF7Hk/OdWNAUiGzpB6TR8NE2YwaydUMIh8MA+NSpYJCgyVbCkzUaxgxYrVYRpkHN5CjfSZZlQyZXGk7QkI+Gi5IzZkWSpCl+GirqBhgzi9twgoYesjr9gGsFM2aD1rJZ8p0MJ2joIavP61mjWRgOhwPd3d1obGws9lSYPzFZ0CiKIhzBrNEUADad8s9///d/Y9u2bRgcHCz2VJg/QeVOyEcDpGsHA8bMdzKcoJnsDFbHGrCgmR81NTX4/e9/X+xpMCqyxdKQFq+OJTMK1s7OzoL+wYX+vVOnTiGVSqGrqwuBQAAWiwXHjh0DkBZCegjaK/QzXSjXX3+9yBUDZp+/0e5vPhT7HkdHRzE8PIzR0VGxqR49ehTBYBBVVVVYvHjxgq5f6Puzbtq0acoPA4HAnMOOcxnb2dmJbH9vrtdOJBIirmDfvn2orq7G6tWr0dHRgXA4jA0bNswpezuXOec6Ppd71Oo5z+faamab/0Leod7HAvp4hyMjIzh+/DgURcFrr70GAGhpaUFHRwdqamqwcuXKeV9bq/ubbnxPT4+xTCe1ykh2qjqGhktEMGaB3AB0ogpcOGllZ7DGqB8w7cL0IqhYEMOYgZm6IfDxtsbQA47H4yIUm3wyLGgWDhUUY4qPWtA4nU4AF9IQjOgMNpSgIXNpaGhI/Iz6OXGeE2Mm1IJmcnSwLMuG2xQMJWhIkqvjCOgl6OG0iWHyhbrtCmk06tgxo5lPhhI05KNRn5KQ/cqmE2M2JgftUcAeYLxyEYYSNCTF1ZKdpD0LGsZskPlEjeTUvkmj+WkMJWiyNY6jUyc2nRizke2Im7ohGO2I21CCZnJCpcPhEHYsazSM2aA1TVo7cME/yT4aDZmcUKl+ASxoGLORLbHS5/MBMF5ipaHarYyNjSGVSsHv90OWZTgcDnHkF4/HC95CYjq43Yr28zBzuxUikUhkHGkD6dQEasWinqMe1uhM4w3TbkXdZiWZTMJqtaK6uhputxsWiwWVlZWmbb8xn7E8j/mP1cs8xsfHEY1GUV5eLvw1lO/ncDimXEsPc55uvGFMJ7Xzi6Sm1+sFwI5gxpyQO8BmswlBE41GAfCpk2ZkEzQcrMeYmWzRwbT2+dRJI+hoW13SkEwpdS0VhjEL6gMOSrFhQaMx6n5OBHnlWaNhzEi2/k60ySqKYqgeT4YRNPSA1aHX5KMhgcMwZoM2UVrjRm27YhhBQ9mq6gdNrXDZdGLMCgka2lQpMhgwVlkPw3yhZDqp+zlRwB5rNIxZmdx2JRqNCpPJSImVhhE09FCz9XNiHw1jVrJ1QyA/JZtOGkBxA2qNhuA2K4xZIUFDbgLgQlSvkZzBhklBGBsbQywWg8/ngyzLqKysFP6aUCiUU5IZpyAs7NqcglCYeYRCIYTDYQSDQZSVlQkNZmhoCLW1tRgZGRGbrB7W6EzjDZOC4HA4YLPZkEgkMtIPAKC2thYTExOmD0k34pz1Mg8jzhlIr/vx8XEsWrRICBVZluF2u1FRUZFxPb3M2bApCLIsC9OJJCYJGYvFwqdOjGmZqe2KkUpFGOILVdui9JBJarIjmDEztIlKkiSEDpWIMFK+kyEEjVpyk8edawUzpYB6I52c72SkmjSGEDTkBEskEuKYm2Jo+MSJMTNqt8DkfCfWaPIMCRr10TabTkwpoF7f5JekCpPso8kzJGjU3Q9IurMjmDE75B4gdwFtuKlUyjCxNIb4SifXCga4Fg1TOpCgoVQbtclkFK3GEIKGNBp1MBBrNEypMDnfSR1sZ5R8J0N8paQeqr3snOfElAokaGhzVdeiMUoGtyFSEKjy++DgYEYiWTAYRCgUgtVq1U04P6Cf8HWtrs0pCIWZB42PRqMIBoOw2+1i/ff398Pj8eD8+fNIpVK6WKMzjTdECoLD4RCOL6vVCqvVKupzeL1e4Y03e0i6Eeesl3kYcc403uv1Ih6Po6qqKkO7cbvdcLlc4pp6mvNkDGE6TfbRqFPmuRYNY3bID6n+gI1WKsIQgoY866TuqVPmOWCPMTvkh1T7I8kJbJSgPd0LGvWDpJ42auHCp06M2clW/IpKpLCgyRPZ+jlRJiubTUwpQBurutc8fQscR5Mn1A9ysunEZhNTCpBG43Q6hQYfDocBsI8mb6hrBVPsQEVFBQAWNExpoHYPkEOYuiGwoMkTFJDEwXpMqaLeUGnt06kTRwbnCXqQ6sxtipvhWjRMqUDCxuFwAMjUZIyQWKl7QUMajdpXQ05gFjRMqTA5lkbdSM4I5pPuUxCypR+UlZUhGAwiHA6L6+klnB/QV/i6FtfmFITCzEM9PhqNIhwOw2q1QpZljI6OiiNuv9+f03UBTkGYQiwWQywWg91uF+ojdUDweDwFqQKv5bXNPme9zMOIc1aPr66uhiRJ8Hg8GWkINpsNbrcbqVRKd3NWo3vTiUwmtarItWiYUiNbIznyWxrBIax7QUORj+oISHroFoulKHNimEKTLQ2BTmKNELSne0FDfhnSaNQSnSODmVKBDj7UaQjkDzFCTRrdCxo6uqOHSnEEAOc5MaVDNo2GStuy6ZQHSKOZ3GYFYB8NUzrQpqrWaEjQsEazQNS2J5lOFKzHQoYpJSaX8wSMlVipa0GjdgCToKmtrQXAZhNTWtDBh9p1QImVrNEsEHXEI/2bJDtrNEwpoY6Cp2+AAvX0ptH813/9Fzo7OzN+pmtBQw+QEsgATqhkShN1YiWdvJLppLcUhPXr1+Oee+7JEDa6FjTZ+jmRM5hNJ6aUUIdykEOYnMHJZFJX5tOmTZuwe/fuDGFjAaCfGTIMYxpuvfVWlJWV4Z577oGUSqUw+X9jY2NTfjbd/3IZu3///jmPTaVSOHHiBI4cOYKf/OQn2LhxIzZu3IiXX34ZR44cweDgYEHmrOU96mXOuYwFoIt5aPns9PoOP/nkExw5cgTf/va3sXHjRtxwww04cuQIjhw5gqGhoaLfn3r822+/jaNHj+Lxxx8HoHPTiYL11M4uMp24uh5TakxujSvLctZvpNjs378f9957L3bv3o1NmzYB0LmgoYfHRa8YZqqgAfTZ3+nw4cMZQgYAdK0WkKqufohc9IopVbK1XaFvQ0+ChswlNYbSaNSSnAUNU2qQRkPthgDjFCnXtaAhjYYEjvqIj300+UO9cJkLdXn1BoV0qNc++WjoW5kLV1xxRX4nNgcKKmiqq6tx8OBBXH755bDb7Whra8Nvf/vbacdP1mjUH4QRBE13dzcaGxuLPY0ZeeWVV+DxeGC329He3o5XXnml2FMqOnV1dbp8bzNpNHN1Bh88eBAbNmyY0/eXTwoqaFavXo0dO3bgySefRDwexw9/+EM8+OCDWceqj1OpNiqdOFksFt0H7P3gBz/Atm3bMDg4WOypzMgTTzyBnTt3Ih6P41//9V/x05/+tNhTKio/+MEPsH37dl2+N3IXqDV7MpnmqtHs2LEDTzzxxKzfX74p6Nf6wQcf4OTJk/jyl78MALj66qunLV6lltAUGWykEp51dXX4/e9/X+xpzMr777+PO+64AwCwbds27N+/v7gTKjJ6fm+07tUaDWn7c9VoTp48KWr6zvT95Zui2h/f+ta38JOf/CTrf1NL6MmmkxHMpkceeaTYU5gT0WhU7JSSJCEajRZ5RsVFz++NMrglSYIkSVAURWg0ufR2oiPxmb6/fKNpu5Xq6uqMur6pVAqhUAhWqxWPPvootm/fjo0bN2Zt/RAKhUQuBy1+WZaFGTX5d4rVuiTbPdLc1NXgC93WZi7jq6qqYLfbkUwmEQwG4Xa74XA4kEqlMhJZJ2P2diuzvbdCzWPy+Gg0muFGCAQCGB4eRjAYRDKZnNN7sVqt6OjowI4dO2b8/vI1Z/F3tW63otZMPvnkE/h8Pvz7v/87fvazn6G1tRVAdi+/xWKB0+mELMtCg6mvr8/aZiXfc851vPoeOzs7MwKVZvv9YrcM2bhxI1577TVs2bIFv/71r3HllVfCYrHM+LtGbF2S65xz+b1CvUOn0ykCVp1OJ0KhECRJgtvtRiwWm9O19+3bN6fvL19zJgpqg6xevRp33HEHzp49i1WrVomfZ3NkzZS5zTE0+eMb3/gGtm/fjlAoBI/Hg127dhV7Ssw0qF0GlZWV8Pv9QsOZq4/mkUcemdP3l28KKmjee+899Pb2zmks2ZxkPgHGcgYThXiJC+HOO+/E1772NW5do6Kzs1OX703tm6FNlwQNkBY2s30bc/3+8o1uz4hJQqvtRyM5g43ETP4YRl9MjqVRO+/VpW9nYnL1u0KgW0FDppP64dFDZtOJKVUm5zupO7jqKYN7MroXNNla4bJGw5QqFKiq3mznk4ZQaHQvaNQPj6S53qOCGUYrsgXt5ZqGUAx0+8WSgCEfjTo1njUaplQhTUbdSJEOTFjQzAPqTEk+GrVwYR8NU6rQd5CtB3cu0cGFRreChkwnrkXDMBfIRwZ3MdA0BSEbcw1fDwQCiEQiCIfDkGUZkiSJmAF17MB85qFFOL+aud6jXuas1f1pOQ8t7w/Q7zsMh8MIBoOIRCIZQa2RSARjY2Oi59NsaHF/M43XPAVhPmPj8bgItY5Go7BarfB4PHC73SgrK9NtOL+exvI85j9Wz/OQJAnnz59HeXm50G7i8TicTiecTuecr1/oZ6db04kgXw3XCmaYCxnc6ghg8s2wjyZH1LYmRa2SSsiChillsnWszLUmTTHQpaBRS2j6NwkYPtpmmDT0LZCA4YC9HMnWz4nznBgmU6Ohk1jS+lmjyRGSzKOjo+JnXq8XAEcFMwxBdWTUmoxetRpdfrUUpKd2bpGAYUHDlDqT3QhqTUavWo0uv9qZmmGx6cSUOpOjg9VlPlijyQGSyurAPPbRMEyayYmV6o2ZNZocIJNJ/QC5Fg3DpKFvgHw06kMT1mhygGvRMMz0ZEuspMBWvWo0usx1Gh0dRSQSwcTEhOiCEIvFEIvFpv17eskbAvSbJ5Ova3OuU2HmMdNaDwaDkGVZbMrnz5+H3W5HIBCYk9bPuU5I19ooKytDIpHIyHMCgNraWpSXlxdkHoW4ttnnrJd5GHHO040PhUKIRqNoaGgQ2g21XamoqNBVixhCl6bTZB+NWkJztX6m1MlWKoI0ibkWKC80uhQ0JGDo1Eltixqp1QrDaAEJGnXjt8mF4vSG7gSN2plFUppCrSVJYo2GKXmy1Q0Oh8MAZo5BKya6EzRqiUxSmuqj8okTw2S6DyhSno64WdDMEbVGQ55xktxsNjFM5ndAjldqJMem0xxRBxyRU1jtWWeYUket0dBBid5r0ujuyyXVT52/wcF6DHMB9XdA34bem8jpTtDQg8qWfsAaDcNkfgek0ei9Jo3uvlxyAKvzNyhYj/OcGCYNbb70bcRiMfHf9Oin0V0Kwvj4OILBIAKBgHhgsiwjGAzC7XZP+/t6CecH9B2+no9rcwpCYeYx0/hwOIx4PA5FUSDLMgKBgIg7oy4JM1HyKQiBQAButxupVAplZWWwWq2ora2F2+1GdXX1jL9v9pB0I85ZL/Mw4pxnGl9TU4NwOAyv1wur1YpwOCy0G6fTmRHkutB5mDIFgZxaalWQ4mj4eJth0pAbgTQXPbdaAYD/D1iQrkC/ibDLAAAAAElFTkSuQmCC)
A. 1
B. 2
C. 3
D. 4
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT Quốc Gia năm 2019 môn Toán Trường THPT Đồng Đậu lần 1