Hàm số \(y = \frac{1}{{{x^2} + 1}}\) có bảng biến...
Câu hỏi: Hàm số \(y = \frac{1}{{{x^2} + 1}}\) có bảng biến thiên như hình bên. Tìm khẳng định đúng.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASUAAAB3CAYAAABFVlY/AAAACXBIWXMAAA7EAAAOxAGVKw4bAAATcUlEQVR4nO3dXUhb9/8H8Hf+7MKLpLGkF0ntILra2puilDi31c1VYRGlprBWW6haRh90DF3jRa/mA4z2Ik4K21wZW1u3+oAD7c9EHWvV1cIGwyTzxod0VQZJzkWLpudAHQy+vwt/5/yTmmeN52g+L8iFOcecrzF55/vwyTkqxhgDIYQoxP/J3QBCCAkmayipVCo5D08IUSDqKRFCFIVCiRCiKBRKhBBFoVAiJM0IgoDp6Wm5mxERhRKRxejoKAoLC6FSqaBSqVBYWAiPxyN3s9ICz/Po6OiA3++XuylhUSiRbWe321FRUYHq6mowxsDzPCoqKnDo0CHY7Xa5m0dk9prcDSDpxe/3o6mpCTabDVarFQCgVqvR2toKtVqNpqYmHDt2DAaDQeaWErlQT4lsq97eXgQCAZw4cWLDthMnTiAQCKC3t1eGlhGloFAi20YQBIyNjUGr1UKv10fcb3Z2dhtbReLhcrlC5gAPHz6M/v7+qPtPT0/jyZMnePLkCaanp8FxXFzHSjiUPB6P1Dir1QpBENDf3499+/Zh3759URsqJ4/Hg0uXLklP6r59+9DV1QVBEMLuL/5d77zzDsrLy1FTU4NLly7RZGwK6fV6aLVaeL3eiP8Xsv3sdjtu3LiBe/fuSXOAlZWVOHv2LMrKykL+V4Ig4LvvvkNubi6Ki4tx8OBBHDx4EMXFxWCMweVyxT4gS4DT6WRtbW2M53nm8/lYTk4Oq66uZlevXmU8z7O+vj6m0+mY0+mM6/ESPHzSnE4nM5vNbHFxkTHGGM/z7IsvvmA6nS5sexcXF5nZbGZ9fX0h9/M8z9ra2uL++0go8TWTk5PDfD5fwtvJ1vD5fKysrCyu59jn87GLFy8ynuc3bLPZbAwAKy0tlba3tbVFfVyn0xnzuHGnQrjG1dbWSi8gnudZaWlpQi+o7QglnudZR0dH2CfV6XRuCCafz8fMZnPE4In2eCQ6CqXtIwZGsreRkRHGGGPffvtt1A/h2tpaBoDV1tbG3Jex9f/xr7/+GnWfuIdvDocDJ0+ehFqtlrppXq8Xx48fh8FggFqtxo8//og///xTUSsnTqcT7733ntTuYAUFBbhz5w6eP3+ODz/8EB6PB83Nzfj4449RUFAQ9vHUajUKCgpoGEcUzWq1gq13OjbcfD4fysrK4PP5Iu5TWVkJAPB6vVHn/7766iuUlpaip6cH169fj7qvaHJyMur2uENpz549KCkpkX72eDxwu904evSodJ9erw/75o9X8Ni0rKxMmv9J9BZc68JxHHJzcyMes7KyEjabDU+fPsWhQ4dw4MAB6R8SSVZWFmZmZpL+OwnZKQ4cOACNRhNxu1qtxg8//ICcnBw8ffoU58+f3/R8YNyhdObMmZDAmZiYAICwS7vJCn78Bw8eREzxWLfgUJmbm4t53MuXL6O0tBQA8OzZs5j76/V67NmzJ4m/kMQjOzs76huBbB+NRgOe56Pu4/F48Pnnn6O2thYPHz7ErVu3Iu47MzODY8eORX28pEsCZmdnkZ+fH9IL8Xg8GB0dTfYhU+LIkSMx91Gr1cjKygIA9PT0oLOzM+r+HMfhxYsXW9K+dKLRaJCdnR1xO8dxCAQCyMrK2lSPm2ydgoKCqEv5fr8fHo8HNTU1uHHjBkwmE1paWsK+hwRBwH/+85+tCyWO46Rumd/vx+PHjze8eHp7exU1nwSs92pizf/Y7XZ4vV48evQIOp0OLS0tUb/u4PV6Yz6xZCO1Wo3y8nIEAoGwL3Sv14vnz5+HTAkQeeXm5sJgMIQdkvn9foyOjuKjjz4CABgMBkxMTKC0tBQtLS1SyRCw3mE5ffo0Tp48GTsjok6D/8/IyIg0wx78s81mk/YRywUSEefhNyXWaplYLiCu9oyMjEQsFWBsffWgpaWFVt+SJK6wBb92RMGruSR1EikJEPn9fubxeKSb0+mMutLmcDiYyWSSVvNMJpNUkhNL3KEkvknFGh6TycRqa2sZz/NscXExqTfqdoQSY6H1VSKxVik4kIL3F4Opr69P+j2Hw8Gqq6vpTbNJ4nK1GExi/ReClqJJ6iQTStsp7lS4evWqlHhiAZSYhJGKq2IefJtCibH1gsjq6mr29ttvS7dXiyODBRdYiml/8eLFuNOeRBfuk5SKUrcHz/Ps0aNHcjcjIhVj8l1iSaVSQcbDE0IUiL6QSwhRFAolQoiiUCgRQhSFQokQoigqrK9+EEKIIrwm5+oXrb4RQl5FwzdCiKKkLJQ8Hg+mp6fptKaEkISkJJQEQUBDQwPeffddTE1NpeIQhJBdKiWhxPM8lpaWkJOTQ9+mJ4QkJCWhNDMzg6dPn6KxsVFxpzIhhChbSkJpcHAQOp1uS89KSQhJD1seSuIFBSoqKiKefJ8kRxAETE9Py90MQlJqy0NJvKDA6dOnt/qh0x7P8+jo6IDf75e7KZs2OjoacsXVwsJCukIMAZCCUPJ6vcjPzw+58gkhwex2OyoqKlBdXS1dcbWiogKHDh2Kehpikh5e2+oHHBwcRHNzM534nYTl9/vR1NQEm80Gq9UKYP3c3a2trVCr1WhqasKxY8dogSSNbWlPye/3459//qEyABJRb28vAoFA2EWQEydOIBAIoLe3V4aWEaXYdE/J4/GA4zgUFxfDYDCgv79/K9pFdiFBEDA2NgatVhv1Sqqzs7Pb2CqiNDF7SoIg4NKlS1CpVFJ3O3hbQ0MD2tvb6eskZNP0ej20Wi28Xi+9ntJYzFDq7OxEQ0MDnE4n7HY7XC6XtE2s3C4vL6c5JBKT+HqJZWlpKeZVWcnuFTWU7HY7srKyUFBQAK/Xi3///Tek2y1Wbh8+fDjlDU0XnZ2d0jL5q7f9+/fjwYMH2L9/f8R9aPWK7HRRQ2lmZgYVFRUA1lfVjh8/HrIqsrCwQN9v22JWqxVs/dJXG24+nw9lZWXw+XwR96msrJT7TyBkUyKGkiAIOHLkCAwGA1wuFxwOR0hBpDhpmZ2dDY1Gsy2NJUROfr8fb7zxRsRearRbZ2en3M3fMSKuvqnVapw5cwYAMDExAa1WG9IjEucHGhsbaT6JbCmlftAZDAb89ddfcjdj14tr9W1sbGzD0I3mk0iiNBoNsrOzI27nOA6BQABZWVn0QZfGYoaS2CM6evRoyP00n0QSpVarUV5ejkAgAI7jNmz3er14/vz5htcaSS8xQ0n89ApG80kkWefOnYNWq8XExMSGbYODg8jJycG5c+dkaBlRipihJBa0jY2NQRAECIIAi8WChw8fUn0SSZjBYEBjYyNaWlqkyV9BENDe3o6enh7cvHmTvveW5mKGksFgwE8//YQXL15Ao9HAaDSioKAAOp2O5pO2mUajwWeffbbj37RWqxUOhwMDAwNQqVTQaDRwOBxwOp1U0kCgYklceK2zsxNff/01Hj9+vKk3CF33jRDyqpgV3SqVCnV1ddJ94nwSnX+bEJIKUUNpYWEBJpMJzc3N0n23bt0CAFy+fDm1LSOEpKWopy45fPgwiouLkZubC0EQ0NnZCYfDgXv37tEENyEkJaL2lCorK3HkyBEYjUZoNBq8ePECExMTyM3N3a72EULSTFIT3Vt2cJroJoS8IiXXfSOEkGRRKBFCFIVCiRCiKCoANKlDCFGM1+ScaKaJbkLIq2j4RghRFAolQoiiUCgR2Y2OjtJ13oiEQonIQhAEjI6OorCwEJ988gld541IKJTIthIEAWVlZTAajVhYWMDrr78ud5OIwkT9Qi4hW02tVuPBgwfSz263W8bWECWinhIhRFEolAghikKhRAhRFAolQoiiUCgRyfz8PJaXl+VuBklzFEpEYjQa0d/fj7179+L999/H2bNn0dbWhvHx8R21SjY/P49PP/0Uv//+u9xNIUmgUCKSjIwMXLt2DXNzc1hbW0N/fz/a29tRXl6O4eFhuZsXt+XlZQwPD+Ott96CwWBAQ0MDxsfH5W4WiROFEgEArK6u4s6dOzh79iyys7NDehmtra1oa2uTr3EJMpvNWFpagsvlQn19PaamplBeXo69e/fiwoULGB4extramtzNJBFQKKUxjuPwzTff4NSpU9IbluM4dHV1YWhoCMDOC6Rg+fn5uH79Oubm5jA3N4empia43W7p7z179iz6+/uxuroqd1NJELpwQJoRhzb379/H1NQUAMBisaCqqgpmsxl6vR4AcOrUKbz55pu4du1aSttTV1eHx48fb/pqy4kQn4OBgQGpRxjuOSDyoFBKA/Pz89Kb0O12IyMjI+RNmJmZGbK/2+2G2+1GfX19ytsmRygF4zhOCmlx3qmkpARVVVWwWCwwGo3b3qZ0R6G0S7ndbgwMDGB4eBjz8/PIzMwMCaKMjIyIv8tx3Lb0Fvx+P86fPw+3241ffvkFBQUFKT9mNKurqyEBtba2hvz8fFRXV8NisSAvL0/W9qULCqVdZGpqCvfv38fw8DCWl5eh1+tDgkgprFYrvF4vtFrthm1///03vv/+e1l6TcHW1takgBInxvPy8mCxWFBdXY38/HxZ27ebUSjtcMGf7BzHwWg0Sm+coqIiuZu3awQH1OrqqvQ8V1VVoaSkRO7m7SoUSjtM8Cf4+Pg4VldXkZeXJw0x6BM89aampqShsTjUtVgs+OCDD2CxWORu3o5HobQDRJrrqKurg9lsprkOGbndbty9e1caMotzd2JARZu7IxGwOPl8PmYymZhOp2MjIyMh25xOZ9j7Y0ng8GnH7/ez7u5uZjabGdavzcdKSkpYd3c3W1pakrt5JIy5uTnW2trK8vLyGACWkZHBampq2O3bt9nKyorczdsx4koFnudZS0sLW1xcZDabjZWWljKe56XtIyMjTKfTMafTmdjBKZRCLC0tsa6uLlZUVCQFkcViYbdv32Z+v1/u5pEEiP/L/Pz8kP9ld3c3/S9jiGv4ZrfbAQCVlZWoq6uD1+vF8PAw1Go1AIS9Lx40fFuvIerv78f9+/fjqiEiO8/y8jLGx8cxMDAgFaxSLVQUsVKL53nW0dHBeJ5nPp+P5eTkMJvNFrK9tLSU1dbWJpyIcRx+V3K5XKy5uVnq5mdmZrL6+no2NDTEXr58KXfzSAr5/X52+/ZtZrFYpB5Ufn4+a21tZXNzc3I3TxHiCiVxWDYyMsJycnKYz+eTtic7n8RYeoXS5OQku3LlCjMajQwA0+v17MqVK2xsbEzuphGZrKyssL6+PlZTU8MyMjIYAJaXl8eam5uZy+WSu3mySWj1ra6uDgBw9+5d6T673Y76+vqkKnJ3+/CNaohIvNbW1jA+Pr6hFspsNqO6ujqtaqHiDiW/34/jx4+jsbERVqtVuj/Z+SRg94US1RCRrTI8PIyff/45pBbKbDZL81C7WrxdKqfTyQ4dOhSywraZ+aT/hWFSv6ckKysrYecIurq6aI6AbInJyUnW3NwsDf0zMzNZTU0N6+vr25VzkHGnQrhl/83MJzG2c0NJrCEqKSmhGiKyrVwuF7t27VpILZRYNrJbaqES6inpdDpp5U38OZn6JOngcYaSw+FgJpNJCgCTycQWFxeTOmayItWdUA0Rkcvc3By7fv16yGvSbDbv+FqohLoqfX19TKfTScFw8eLFDYWUCR08jlAaGRlhAKQw5HmetbW1MQBJ99DiFalCt6+vb9d8KpHdIVzhbVFREevq6oq7966UoWDS46fNzicxFjuUwtVFiWw224byhK0g1hAFj9+phojsJOG+ohRPLVR3d3fCr/FUjGLiCiVxPqmvr0+6L9zEd8IHjxFKNpst4vDw1eHkZog1RHq9nmqIyK4SvBATqxbK5XIxs9kcdzClahQTVyjV1taGJKDYS9psIEQLJfEYkXpDYigl21MbGhpi9fX1LDMzkwFgRqORNTc3s99++y2pxyNE6V6+fCkVa4qve/EDeHJykjHGmMViiSuYUjmKibunJB58cXFx08M26eCbCCXxSYl3Tiv4HxL8idHa2prW1bMkfYkfzOIIITMzU5qTihVMqRzFvBZPLVNlZSUWFhagUqmg0+nw5ZdfoqamJtnSqLjwPI+lpaWY+y0tLYHn+bCFmxzHhVTJAv9/2R06DxFJdxaLRSrEDD5xHQCMj4/j1KlTGBoa2nBOKEEQMDY2Bq1WG/Vc7rOzs0m1K+7rvlmtVjDG8OzZs5QH0lZZW1vDhQsXsLq6iu7ubukChc3NzRRIhATJzMwEx3HgOE76WbxKcqL0ej20Wi28Xi8EQUj49+PqKe1URqMRKysrdPoPQqLo7+/H/Pw8qqqq0NTUhKKioqhnzNyKUUw0uzqUAFAgERKD0kY+O/6y3dnZ2dBoNHI3gxCyRRQbShqNBtnZ2RG3cxyHQCCArKyshLuHhBDlUmwoqdVqlJeXIxAISJNvwbxeL54/f46jR4/K0DpCSCzJjmIUG0oAcO7cOWi1WkxMTGzYNjg4iJycHJw7d06GlhGSvlI9ilF0KBkMBjQ2NqKlpQWdnZ0A1msk2tvb0dPTg5s3b8p+eWdC0k2qRzGKDiVgvT7K4XBgYGAAKpUKGo0GDocDTqcTlZWVcjePkLSU0lFMUnXgW0TmwxNCNsFms6XkC7l02W5CSNJGR0fR1taGP/74AwBgMplw69athC8iEoxCiRCiKIqfUyKEpBcKJUKIolAoEUIUhUKJEKIoFEqEEEX5L7YcEuBY7rAPAAAAAElFTkSuQmCC)
A. Hàm số có giá trị lớn nhất bằng 0
B. Hàm số có giá trị lớn nhất bằng 1
C. Hàm số có giá trị nhỏ nhất bằng 0
D. Hàm số không có GTLN & GGTNN
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG năm 2019 môn Toán Trường THPT Tôn Đức Thắng