Cho hàm số \(y=f(x)\) có bảng biến thiên như hình...
Câu hỏi: Cho hàm số \(y=f(x)\) có bảng biến thiên như hình vẽ. Hỏi hàm số có bao nhiêu điểm cực trị?![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAtIAAACvCAYAAADQSTmcAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3df0xT9/4/8Ge/4Q9zUxRv+QNEM/kVJRtKHW6asSsqTHBl02RE3LwWAzf4iwumRWBeg8xr/DEaMMiQKREZmeyCEa9nA68oXWSRDbQg7qLhl8vw0iUwUZuFP5r084dfOio/7aCnPX0+kmba08qrTs558jrvHzKLxWIBERERERG9lP8ndgFERERERK6IQZqIiIiIyA4M0kREREREdmCQJiIiIiKyA4M0EREREZEdPMQuwF3IZDLrr7lQChEREZHrY0eaiIiIiMgODNJERERERHZgkCYiIiIisgODNBERERGRHRikiYiIiIjswCBNRERERGQHBmkiiTOZTIiKioJMJkNUVBRMJpPYJZGT0ul0kMlk1ocgCGKXRE6C5xGi8TFIE0nUyIXP09MT169fF7sccnJqtRpHjx7FnTt3YLFYcOfOHSQmJkKn04ldGomI5xGiyTFIE0mUXC5HfX09LBYL8vLyxC6HnJhOp0N5eTmys7OhVCoBAEqlEtnZ2dBqtexMuzGeR4gmxyBNROTG+vv78dlnnyEgIAAffvihzbF169ZBoVAgLS0N/f39IlVIROS8GKSJiNzYl19+iZ6eHvj7+8PT09PmWHBwMMLCwtDT04Pbt2+LVCEROYpOp4NarRa7DJciuSA9eqLMyKOxsREAcOLECZvnT5w4IXK1zuXFiUb8ZiKSvrt37wIA/Pz8IJfLJ3xdVVWVo0oiIhfX39+PwMBAm0wh1fkWkgvSAwMD2LVrl/X3H3/8MSIiIgAA+/fvx8cff4z58+fjwoUL2L9/v1hlikIQhAln5KvVami1WuTl5cFiscBisSA+Ph6BgYG8pUskUf39/dZGw7Jly8Ycl8vl8PPzAwA8evSIKzUQEYCxQXl0462/vx8RERF48uSJdfKyxWIBAEk26CQXpBUKBT777DNs2bIFAFBcXIzBwUEAwODgIL766is0NDQgISFBzDIdTqfToaqqyvoP2mKxoKqqCoIgQBAElJeXY/v27dBoNNb3qFQqVFdXc4IJERERAQAMBgPef/99NDY2WvPEsmXLoFarYTKZ8Ne//hU9PT0oKyuzTl4GAI1Gg2XLlkmuMy25ID2iqKgIgYGBePz4MT766CMAQExMDMrKyrB8+XKRq3Os/v5+PHjwAEVFRTbPFxUV4dtvv8Unn3wChUKB9PT0Me9VKpWYO3cuu9JERERuzmQyobi4GJcvX4avr6/1+ZGQrNFocP36daxfvx6RkZFj3v/hhx/iwYMHkrq7JdkgrVAocPHiRQDA1atXERQUBI1GYx3m4U6MRiPeeOONMeMf5XI51qxZg+bmZrz77rs2PzmO5ufnB6PR6IhSiYiIyEl1dnbC09PTJkSPSElJQXd3NwAgNjZ23DkXvr6+8PT0RGdn56zX6iiSDdIAsHz5cly4cAEA0N3djYULF4pc0R/z4mTA6Twmu4ViMplQUFAAAIiPj3fUx6Bpsuf/N9f7pdky1WREInIdE11ftFotysvLxz02sqNlSEjIuH9mZ2cnWltboVAosG7dugm/9kTvd1WSDtIjAgMDAQDvvfeedby0K9JoNDZjnKfz0Gg08PHxwQ8//DDmVoper8f169cRFRWF3377bcKv++jRI/j4+Mz2x6MX2PP/W6VSiV02uRBPT0/4+/sD+H31jtFMJhMePXoEYPzJiETkmia6vuTl5WH79u3jHquvr0dQUJD1nPCiGzduYHBwEGFhYQgODp7wa3d0dMzWxxKFpIN0W1sbdDodvv/+e4SHh+Px48eIiYkRuyyH8/X1xXvvvYc9e/ZYnzMYDEhMTERAQADKy8vx9OlTGAyGMe81GAx4+vTpuLdxiMi1yeVyxMbGAhh/VY5nz56ht7cXALBkyRKH10dEzsXT0xP//e9/x+SFkY2dFAoF1qxZA71eP+77TSYTvLy8Jg3arkayQbqnpweZmZmoq6uDQqHAV199hfnz56OlpQW7d+8WuzyHU6lUiI+Pt96iWbFiBcLCwtDW1gZfX18kJCTg2LFjNt8cBoMBKSkp0Gq1IlZORLNpZPfC3t5ePHv2zOaY0WjEkydPJpw4RETuRS6XIysrCykpKdZFCEaWu+vp6UF2djYOHjyIX375ZdwJhXq9Hn/6058kNUxMkkF6cHAQW7ZswfHjx6FQKAAAAQEBqKioAPB8SbzKykoxSxSFSqUac5tm5B+zXC5HaWkpMjIyrGE7IyMDN27cYDeaSMKUSiWys7PH3b1w5FZtenq6pC58RGQ/pVKJy5cvIyIiAjKZDAsWLEBPTw+uXLliXUJ3xYoVWLdunc2KXyPL8I5eZlcKJBekBwcHERMTg8ePH4/Z7vbNN9/E/PnzAQC7d+/GN998I0aJTksul6O+vn7coE2ubWT863hdR6KUlBSsX78eaWlp1gufIAjWTZo49p4Ankfod76+vuju7p5wjs6LYVsmkwEAzp8/L1bJs0ZmGdluRiJiYmJw9epV6+9Hf7yR/5GjbdiwAXV1dbNe1+ivLbG/cnJiarUa5eXlY54PCAhAY2Mj7zaQDZ1OZx3KpVAocO3atQmXxST3wfOI+9DpdLh7964kA+9skVyQdlYM0kRERETSIrmhHUREREREjsAgTURERERkBwZpIiIiIiI7MEgTEREREdmBQZqIiIiIyA4es/0Fxltyzt3x74SIiIjIfs6yAho70kREREREdmCQJiIiIiKyw6wP7XCW1rvYuCELETmjic5NPGcREU2NHWkiIiIiIjswSBMRERER2YFBmoiIiIjIDgzSRERERER2YJAmIiIiIrIDgzQRERERkR3cNkh/8803+POf/wyZTIYTJ06IXQ7RrNHpdJDJZNaHIAhil0RELobnEaLxuW2QHjF//nxkZmaira1N7FKIZpxarcbRo0dx584dWCwW3LlzB4mJidDpdGKXRkQugucRoom5bZDeuHEjfv31V/z6668IDw/Hs2fPxC6JaEbpdDqUl5cjOzsbSqUSAKBUKpGdnQ2tVsuOEhFNiecRosnJLG6+ZdXg4CCCg4PR0tKCgICAWfs63CWMHKm/vx8REREAgMbGRvj6+lqPGQwGREdHY968eWOOkfvhzoY0EZ5HiKbmth1p4HmIPnjwILKysmY1RNPM0Ol0UKvVYpfhEr788kv09PTA398fnp6eNseCg4MRFhaGnp4e3L59W6QKiVyDO593eB4hmppLB+kTJ07YTH6QyWSIiYmxec1kxz766COoVCrs37/fkWUTzbq7d+8CAPz8/CCXyyd8XVVVlaNKIiIXw/MI0dQ8xC7gj9i/fz/mzZuHnTt3AgBOnz6NlJQUm9dYLBasXLkSK1euxOHDh22O1dXVOaxWIkfp7+9HY2MjAGDZsmVjjsvlcvj5+QEAHj16BJPJNOlFkojcD88jRNPj0kEaAFJSUtDW1obi4mI8efJkzPHBwUF0d3ejrq4OCoVChAqJiIiISIpcemjHCK1WCwD4/PPPxxy7du0a3nnnHYZoIiIiIppRkgjSAQEB2LJlC7q7u1FZWWlzrKamBtu3bxepMiIiIiKSKkkEaQDYu3cvANgsEN/T04P//Oc/2Lhxo1hlkR1e3EFr5KHValFeXj7usaioKJhMJrFLdzlTTSJydRP9W5rswXVx3RPPO/aT+nlkJvGcJD2SCdIREREIDAxES0uLdYLEtWvXkJCQIHJl9LI0Gg0sFsuYR15eHrZv3z7usfr6ep7I/z9PT0/4+/sD+H3W/WgmkwmPHj0CMP4kIimZ6N/SZA+VSiV22SQCnnds8TwyO3hOkh7JBGkA+Oc//wng+dqXAHD27Nkxq3gQSZ1cLkdsbCyA32fTj/bs2TP09vYCAJYsWeLw+ojI+fE8QjQ9kgrS0dHRmD9/PoqLi/HNN9/g8ePHWL58udhlETncunXroFAo0Nvbi2fPntkcMxqNePLkCdavX4/IyEhxCiQip8fzCNHUJBWkFQoFdu3aBQB49913kZGRIXJFROJQKpXIzs4ed9exGzduYHBwEOnp6ZK9LU1EfxzPI0RTk1SQBoCkpCTrr6Ojo0WshEhcKSkpWL9+PdLS0tDf3w8AEAQBWq0WeXl5HHdHRFPieYRoci6/IcuLRpbCGxoaQkBAgNjlEIlGLpejvr4eOp0OCxYsAPD8rs2dO3egVCpFro6IXAHPI0STk1ksFovYRcy03bt34y9/+YtTrdghk8msv5bgXzkRuaiJzk08ZxERTU1yQXpwcBBvvvkmvv/+e6fazZAXJSJyRgzSRET2k9wYaW4JTkRERESOIKkx0m1tbdi9ezf+/e9/i10KEREREUmcS3eke3p6EBQUZN1GMywsDFlZWYiIiBC7NCIiIiKSOJcO0vPmzUNQUBAAIDw8HF9//TX2798vclVERERE5A5mfbLh6AkrRETkvCaabEhE5GycZRK0S3ekiYiIiIjEwiBNRERERGSHWV+1w1la72LjmqxE5IymM4SD5ywiovGxI01EREREZAcGaSIiIiIiOzBIExERERHZgUGaiIiIiMgODNJERERERHZgkCYiIiIisgODNBEREU3KYDDA29sbMpkMMpkM3t7eMBgMYpdFJDoGaSIiIpqQIAhYsWIFBgcHrc8NDg5ixYoVEARBxMqIxMcgTeQmBEGwdpNGHrwIEtFk+vv7kZaWhitXrsBiscBiseB///sfAgICAAAFBQUwmUwiV0kkHgZpIjegVqsRFxc35vm4uDio1WoRKiIiV/D111+juroaKpXK+pyvry+qq6uhUCjQ29uLZ8+eiVghkbgYpIkkThAElJeX23SUnj17hvXr1wMAysvLodPpRK6SiJxRcnIylErlmOd9fHwwb948REREwNfXV4TKiJwDgzSRxDU0NODOnTs2HSW5XI6amhprmK6treXtWSKaNqPRCA8PD6Snp4tdCpGoGKSJJKy/vx9z584dt6Mkl8sRGxsrQlVE5OoqKipQWVk57rmFyJ14iF0AEc0eX19f5OTkTHh8yZIlAAA/Pz/I5XJHlUVELspgMCA6OhqDg4NYsGABgzS5PXakidzYgwcPoFAoeHuWiCbV39+PwMBAm2XwtFotJyuT22OQJnJTJpMJtbW1ePfdd9lVIqJJ+fr6oru7GxaLBXl5edbny8vLuYwmuTUGaSI3pdfr0draym40Eb0UjUaDO3fuQKFQAACqqqpErohIPAzSRG5oZJOFsrIydqOJ6KUplUpkZ2eLXQaR6BikidxQVlYWdu/ebbMkHhHRyxiZrLxs2TKRKyESD4M0kZsZ2XxFo9GIXAkRuTqFQoF169aJXQaRaLj8HZETSE1NtU7YmTNnDnx8fKzHfHx8MGfOHACAh4cH/Pz8rMc++OADvPbaa9P+OoIg4O7duzh//vwMVU5E7qqqqoqTlcntySwWi0XsItyBTCaz/pp/5fSilpYWrFy58qXeExUVhdraWnh4TO/nYUEQUFBQgJqaGq4ZTVYTnZt4ziKTyYRNmzbh+vXr2L59u80P4Gq1Go8ePeL5hNweh3YQOYHw8HBERkZO+/VBQUGoqqqasRAtCALXgyUiG6N3Py0vL4dMJrM+4uPjUV9fzxBNbo8daQdhd4emIggC4uLipnydXC7HrVu3pj2kYzp/rkKhwLVr13iL1g2xI01EZD92pImchEqlQlhY2JSv++KLL2Y0RANAWFgYgoODp3zd6dOnsW/fPhiNxml9fSIiACgoKMCOHTvQ1NQkdilEM4pBmshJDAwMYPHixZO+JicnB5s2bZr2n6lSqWCxWKZ8TPcWbVRUFIaGhhAcHIyMjAwMDQ1NuxYicl/btm3Dq6++ih07diA0NBSnTp3i+YMkgUGaSGRdXV3Yt28fgoODsXDhwgnDtEqlwqFDhxxa24uCgoJw7tw5GAwGDAwMIDg4GIcOHeIFkciJDQwM4OHDh2hpaYFer0dNTQ3Kysrw8OFDh9Xg7e0NrVaLjo4OFBYW4vvvv4e/vz+71OTyOEbaQTjekF7U2tqKI0eOoLGxESkpKdi7dy+8vb1RUFCAffv22bx26dKlaG5udrqJPV1dXThy5AgEQcCePXuQnp4OLy8vscuil8Ax0q7v1KlTuH37NoxGI4aHh63/HRgYgMlkGvc9S5cuhcFgsC6tKYahoSFUVFSgpKQEZrMZSUlJSExMhLe3t2g1Eb0sBmkH4UWJRgiCAJ1Oh76+PqSlpSE5OdnmYjY8PAxfX19rl9fLywvNzc0ICgoSq+Qp3bt3DwcPHoRer4dGo4FWqxX1Ak3TxyDt+l52+UwPDw/cvHkTq1atmsWqXk5TUxNKSkpQU1ODmJgYpKSkvNRKRkRi4dAOIgcwm80oKyuDUqlEbm4u9uzZg46ODuzdu3dM4JwzZw7S0tIAPL/gXbhwwalDNAC89tpruHTpEhoaGnD79m34+/ujoKAAw8PDYpdGJHnh4eFITk6e9uv37t3rVCEaAFatWoVz586ht7cXb731FlJTUxESEoK8vDwMDAyIXR7RhNiRdhB2d9zT0NAQysrKcPz4cYSHh0Oj0Uyry2I0GuHv74+cnBxkZWXNfqEzrLW1Fbm5uWhqakJmZiZ27tzJDrWTYkdaGoxGI0JCQqacr7B48WK0t7c73TCx8bS0tKC0tBTV1dWIjIxEUlISYmJixC6LyAaDtIPwouRejEYjdDodysrKoFKpoNFoXmorbwCoq6tz+YtGY2MjDh48iPv37+PAgQPYuXPntDeRIcdgkJaOvLw8ZGRkTPqahoYGlxsyYTKZUFFRgdLSUgwMDCAlJQWJiYnw8fERuzQiDu0gmkn37t3Djh07rBubtLe349y5cy8dogG4fIgGgIiICDQ0NODChQu4ePEiQkJCUFZWBrPZLHZpRJKTkJAw6Z2fvXv3ulyIBp5vQrVz5040NzejqqoKP/30E0JCQhAfH4+6ujqxyyM3x460g7C7I216vR4nT55EU1MTNBoNkpOTuXrFOPR6PXJzc9HX14cDBw5g27Zt7FCLjB1p1zc8PIyCggKcPHkSMTExKCsrG/MaVxrSMR0mkwmVlZUoLS2F0WiEWq1GcnIyFi5cKHZp5GbYkSayk9lsRk1NDVauXInU1FS8//77+Pnnn6HVahmiJxAZGYmGhgYUFhbi5MmT1g41EdlHEASEhobixx9/hMFgwLlz56BSqca87ty5c5IJ0cDzLnVycjJu3bqFK1euYHBwEEqlEnFxcRAEgXe9yGHYkXYQdnekY3h4GGfPnsXJkyexcOFCaDSacS9cNLWamhrk5uYCePldG2lmsCPtmu7fv4/U1FQMDQ2hsLDQZhWOrq4uhISEWMNkcnIyzpw5I1apDjM8PIzKykqUlJSgr68PSUlJ7FLTrGOQdhBelFzfwMAATp06hdLSUqxatQoHDhxAWFiY2GVJAgO1eBikXcvQ0BByc3NRXV2NnJycCZe9y87OxrFjx7Bw4UK0t7e73V2ye/fuoaSkBNXV1QgPD4darcamTZs4lIxmHId2EE1h9BbeT548QUNDA6qqqhiiZ9CmTZtgMBiQmZmJjIwMKJVKCIIgdllETsNsNuP06dMICQnBnDlz0N7ePuna0ZmZmfDx8UFxcbHbhWjg+dr2hYWF6O3txUcffYSioiIsWrQI2dnZDt0anaSPHWkHYXfH9Yxs4d3U1ISkpCTrFt40u8xmMyoqKnDkyBEsXLgQOTk5LrnSgKtgR9r5NTY2IjU1FT4+PigsLJz2Bk1dXV1Ov5mTI92/fx+lpaUoKytDeHg4kpKS2KWmP4xB2kF4UXIdU23hTY7BQO0YDNLO6+HDh8jOzkZrayvy8/MlsSSmMxgeHkZNTQ1KSkpw//59JCYmQq1WY+nSpWKXRi6IQzuIMHYL77S0tAm38CbH8PDwQGJiIjo6OrBlyxZs3boVa9euhV6vF7s0olk1PDyMQ4cOYfXq1Xj99dfR3t7OED2D5syZg4SEBDQ0NODmzZsAgLVr12Lt2rWorKzE8PCwyBWSK5FUkG5sbIRMJhvzGC0mJmbCY+R+hoaGUFBQgEWLFuHy5cvIz89Hc3Mzb/c5EQ8PD+zcuRO9vb14//33sXXrVmzevBmtra1il0Y04yorKxESEoJHjx7BYDBAq9XyXDSLgoKCcPToUfz888/Ys2cPzp8/j0WLFiEjIwP3798XuzxyAZIK0hEREbh58ybmz58PANiyZcuYW5J1dXX4+OOPER4eju7ubjHKJCdgNBqRkZGBkJAQtLW14dq1a7h06RKHDjixOXPmID09Hb29vVizZg1iY2MZqEkyWltb8fbbb6OoqAhVVVU4c+YMt8B2IA8PD3zwwQeora1Fc3MzPDw8rF3qiooKdqlpQpIK0sDzMP3ZZ58BeN5tHM/t27eRm5uLgIAAR5ZGTuDFLbxHNjCwZwtvEsfoQP3mm29i7dq1DNTksgYGBrBr1y5s3rwZKSkpuHnzJsLDw8Uuy60tXrzYpkv91VdfYdGiRUhNTcW9e/fELo+cjOSCNAAkJCQgMDAQV69eRU9Pj82xnp4e/PDDD9i4caNI1ZEY9Ho9Nm/ejOjoaCxfvhwdHR349NNP2fFxYXPmzEFWVhZ6e3uxfPlyrF27Fjt27EBXV5fYpRFNyWw2o6CgAKGhofD29kZ7ezu2bdsmdlk0ykiX+sqVKzAYDFAoFIiNjcXq1atRVlbGLjUBkGiQBoCMjAwAQF5ens3z165dw65du8QoiRzMbDajuroaK1euxL59+6xbeKenp7vluqpS5eXlhUOHDqG3txevvPIKVq9ezUBNTq2+vh6hoaH47rvvcPPmTRw+fFhS23dL0cKFC63nmQMHDuDixYvWLjXvhrk3yS5/Nzg4iODgYDx+/BgDAwNQKBQAnk8suHjxIpYvX+7QeriUlONwC2/3NjQ0BJ1Oh4KCAnzwwQc4cOAA19KdBJe/c5yRzZ0ePnyI/Px8REVFiV0S/QF9fX04e/YsSktL4ePjg6SkJGzbto0/FLkZyXakFQoFEhISAAClpaUAgLa2NgBweIgmxxgYGMChQ4fg7++Pb7/9FlVVVWhoaGCIdjNeXl44fPgwOjs74eXlBaVSiX379sFoNIpdGrkpk8mE7OxsvP3229iwYQMMBgNDtASMdKl//vlnHD58GNevX8eiRYuwa9cutLS0iF0eOYhkgzQAaLVaAMDnn38OAPjXv/5lHfJB0tHV1YXU1FTrFt43b97kFt4EHx8f5Ofno7OzEwAQEhLCQE0OV1ZWhpCQEAwNDaG9vR179+7lcnYSFBMTg6qqKnR0dOCVV15BfHw8Vq5cidOnT8NkMoldHs0iSQfpgIAAbNiwAd3d3aisrERxcTGio6PFLotmSEtLC+Lj47F27VooFAp0dnYiPz+ft/HJxkig7ujowPDwMIKDgxmoadY1NTVh9erVOH/+PGpra1FcXAxvb2+xy6JZ5uPjY50EPdKl9vX1xY4dO9DU1CR2eTQLJB2kAeDvf/87AGDr1q145513uOSdBAiCgLVr12Lr1q1Ys2YNOjs7cejQIV6kaFI+Pj4oLi6GwWDA0NAQgoODcejQoQmXySSyh9FoxI4dO7B161akpaWhoaGBy2u6qZEudWdnJ1599VXs2LEDoaGhOHXqFM87EiL5IL1x40YEBgYCADZt2iRyNWSvkS28Q0NDuYU3/SFBQUE4d+4cDAYDfvrpJwZqmhHDw8M4duwYQkNDERgYiI6ODus8HXJvPj4+0Gq16OjoQGFhIb777jv4+/uzSy0Rkg/SwPOl8ObPn89hHS5oaGgIeXl51i28CwsLuYU3zYiRQH3r1i10d3fD39+fgZrsIggCQkND0dbWBoPBgH/84x/8AZ/GFRkZiQsXLth0qUNCQpCXl4eBgQGxyyM7uEWQnjdvHhISEqxL4JHzG72F948//sgtvGnWBAUF4YsvvkBDQwPa2trg7++PvLw8brZAU7p//z6io6Nx8OBBnDt3DhcuXMDChQvFLotcgLe3t7VLXVxcjLa2NgQHB2Pr1q3Q6/Vil0cvwS2CdFlZGT788EOxy6BpGNnCOzQ0FAC38CbHCQsLw6VLl9DQ0GC99VpQUMBATWMMDQ1h3759WLt2LbZs2YLm5mZERESIXRa5qMjISHzxxRfo7e3FW2+9hdTUVHapXYjkg3RPTw+6urp4knNyer0ecXFxiI2NxfLly9HZ2cktvEkUI4G6trYW169fZ6AmK7PZjNOnTyMkJAQA0NHRgeTkZA4zoxnh5eWFvXv3or29HefOncOPP/6I4OBgxMfHo66uTuzyaAKS3dkQeL67YUxMDOLj47F//35Ra+EuYWOZzWbU1NTg+PHjMJvNSEtLw7Zt23hRIqei1+uRm5uL+/fv4+jRo5L7N8qdDaensbERqamp8Pb2RmFhIZYuXSp2SeQGhoaGUFFRgZKSEphMJqSkpCAxMdHuJpPZbMbw8DB3X5xBkgvSMTExuHr1qvX3GzZscIqf5HhR+t2LW3hnZmYiJiZG7LKIJjUSqPv6+nDgwAG7ArXZbHa6EM4gPbmHDx8iOzsbLS0tyM/P506pJJqWlhaUlpaisrISUVFRSEpKeulrZ3V1Nc6fP49Lly453bnIVUkuSDsrXpSeb+F96tQplJSUIDIyEpmZmdx9kFyOXq/HwYMHYTQaXypQ6/V6XL16FUePHnVAldPHID2+keXsioqKoNFokJ6ezpU4yCmYTCZUVFSgtLQUAwMDUKvVSE5OntZE19jYWNTV1SE5ORlnzpxxQLXSJ/kx0iS+8bbwvnDhAkM0uaTIyEjcvHkTn376KU6ePImQkBBUV1dP+b7c3Fzk5eWhvr7eAVXSH1FZWYmQkBB0d3ejvb0dWVlZDNHkNORyOXbu3Inm5mZUVVXhl19+QWhoKOLi4iAIAsxm87jve/jwofUO/dmzZ3Ho0CEHVi1d7Eg7iDt2d1paWnD8+HE0NTUhKSkJ6enp8PLyErssohlVU1OD3NxcAEBOTs64G0q8EFsAAAdBSURBVD8JgoC4uDgAzzdnMBgMTjORlh3p37W2tiI1NRVmsxn5+flYtWqV2CURTYvJZEJlZSVKS0vR19eHpKSkMV3q7OxsHDt2zOZ9Z86cQXJysqPLlRQGaQdxp4uSIAjQ6XTo6+uDRqNBYmIiuzkkeZMFaqVSidbWVuvvY2JiUFtb6/Aax8Mg/XzY2cGDByEIAg4fPozExESxSyKy271791BSUoLKykqsWrUKarUaKpUK/v7+MBqNNq/18PDApUuXOPb/D2CQdhCpX5TMZjMqKiqg0+kgl8uRmZkJlUrFyQzkVka+D44cOQK5XI5PP/0UJpMJmzdvHvPao0ePIisrS4QqbblzkDabzTh16hSOHz+OxMREZGZm8q4ZScbw8DAqKytRUlKCe/fuwWQyjfs6uVyOa9eu8Q6MnRikHUSqF6WhoSGcPXsWOp0Oq1atQlpaGncfJLc3OlD39fWNuwa1h4cHbt26hfDwcBEq/J27Bun6+nqkpqYiKCgI+fn5CAoKErskolkTHR096fwMHx8fNDQ0cFlHOzBIO4jULkpGoxE6nQ4VFRWIiYlBZmYmvwGJXlBdXY34+PgJjy9evBgGg0HULqi7Bemuri7s27cPXV1dyM/P59KbJHl9fX3w9/efcBLiiKVLl6KhocFp5m+4Cq7aQXYRBAEeHh7WLbwZoolsmc1mZGdnT/qahw8f4m9/+5uDKnJvJpMJ2dnZePvtt7FmzRq0t7czRJNbOHv27JQhGgDu37+PzZs3TzgEhMbHjrSDSLW7Q0TjKysrw44dO6b12uLiYuzcuXOWKxqfO3Sky8rKcPDgQcTExODo0aPw9vYWuyQihzCbzfD390dfX9+036NSqbhhy0tgR5qIaIaZzWYcOXJk2q/ft28f7t27N63XmkwmREVFQSaTISoqStLdoz/6WZuamrB69WqUlpbi0qVLOHPmDEM0uZW6urpJQ7SXlxcWL16MyMhIbNq0CYmJiXj99ddtVhkaTRAEyGQym4cgCLNVvkvgjxtERDOsoqICXV1d03798PAwtm7dilu3bkEul4/7GpPJhE2bNuH69eszVabTmqnP2tfXhz179mDbtm0zVBmRazEajcjJyYGXl5c1NI/+9ctQq9UoLy8f83xcXBy2b9+O8+fPz1DVroVDOxxESrdJiWhydXV1Y9ZrnY6IiIhprR6h0+mg1Wqxfv161NTUTBi+p8PZh3bM5GclIvuMbCp15coV65rTL/7Am5eXB41GI2aZomBHmohohnESGxFJSUNDA+7cuQOlUml9Ti6Xo6amxhqma2trkZKS4nY/7HKMNBERERGNq7+/H3PnzrUJ0SPkcjliY2NFqMp5MEiTlU6ns5lAoFarxS6JiIiIROTr64ucnJwJjy9ZsgQA4Ofn53bdaIBB2q28ONt29ExbtVoNrVaLvLw8WCwWWCwWxMfHIzAwEP39/SJWTURERM7qwYMHUCgUSE9PF7sUUXCMtJvQ6XS4e/euzaSh0R3n8vJybN++3WaigEqlgp+fH/Ly8qDT6RxaLxERETk3k8mE2tpavPvuu+MO/XAH7Ei7gf7+fjx48ABFRUU2zxcVFeHbb7/FJ598MuFPk0qlEnPnzmVXmoiIiGzo9Xq0tra6bTcaYJB2C0ajEW+88caYsUtyuRxr1qxBc3PzpD9N+vn52bWUFxEREUlTf38/0tLSUFZW5rbdaIBB2qW8OBlwOo/JhmSYTCYUFBQAAOLj4x31MYjckj3fv666Y5g7fVYid5WVlYXdu3db15V2VwzSLkSj0VgnAk73odFo4OPjgx9++GHM9rp6vR7Xr19HVFQUfvvttwm/7qNHj+Dj4zPbH49I0uz5/nXVC5Q7fVYidzTSpHPHDVhexCDtBnx9ffHee+9hz5491ucMBgMSExMREBCA8vJyPH36FAaDYcx7DQYDnj59Cl9fX0eWTERERE5IEATcvXvXbbcEfxFX7XATI92e0dv+jt5yNyEhAUlJScjKyrKOdTIYDEhJScHly5dFqZmIiIichyAIKCgoQE1NjdilOA0GaTeiUqlslr8bTS6Xo7S01LrVJ/A8aN+4ccMtF1gnIiKi340O0ePlAkEQUFVV5XadagZpspLL5aivrxe7DCKawt27dwEAvb29ePbsmaR/2HWnz0rkrARBQFxcHADA09Nz3NcoFApcu3bNkWU5BY6RJiJyEWq1GjKZDOXl5QCAnp4eLFiwQJI7kLrTZyVyZqND9GTCwsIQHBzsgIqci8wy0b1+mlGjxybzr5yInMVE5yaes4iIpsaONBERERGRHRikiYiIiIjswCBNRERERGQHjpEmIiIiIrIDO9JERERERHZgkCYiIiIisgODNBERERGRHRikiYiIiIjswCBNRERERGQHBmkiIiIiIjswSBMRERER2YFBmoiIiIjIDgzSRERERER2YJAmIiIiIrIDgzQRERERkR0YpImIiIiI7MAgTURERERkh/8DB8p4od6dRbQAAAAASUVORK5CYII=)
A. Có một điểm
B. Có ba điểm
C. Có hai điểm
D. Có bốn điểm
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG năm 2019 môn Toán Trường THPT Chuyên Thoại Ngọc Hầu lần 1