Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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HomeLớp 12Toán lớp 12 - Sách Kết nối tri thứcBài 4. Khảo sát sự biến thiên và vẽ đồ thị của hàm số.Bài tập cơ bản
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2SyTVKG7A6c4gVbSp7YGQh6ONaFzklEG2r59e6uztGxDtJ3NNPSpMykWky\/TCLwK3Q34\/vDLTzzxRBkjhb9uG2tCJxJJZdiwYcOs7It2CZ745NTpcnr55ZczPtVV6G5ADp3Yy3HHHSdWGtkl21gTOnlz0koPPfSQ1ATnMgh769atMqCAIf+ZngAqdDfgfmaWO0Inm\/Ltt99679jDmtAHDx5sGjRoYFasWOFLsUjUIXhD5B0rh20emXwmKnQ34EFNCzIRdyxXm33oCawInSccEUlubFtrZF2DU4DswwknnCBjpjI5BVTobkCUHcsMV4yuNds5dLAidIJPnFwMg2SmlmIkvcjnQvHMz372s4xyryp0N2DVd7du3aQP3QWzHawIfd26dbJdctq0aTlZKFMY+OrXX3+9qVOnjswAT\/ckUKG7ARF3+tBJHWeTLvUTK0KfPHmy9Ok+88wzgW0tiSKc6kuWLBHBPv7442kPE1ShuwHfAalSphq7cn9bETqDEZs3bx7b+e3ZQKoNa4ex0Jjy6aBCtw9BVLbysGtt0KBBzlR8hi50PggqhmhkUf+8YPhs2FjD0Mx0zHcVun0w1Tdt2iQjnufMmeNEIA5CFzqBiurVq8sIpX379nlXlcP51a9+JYEcovDpDMtUoduH74uVW+XLl5dces4KnYky1HXjn7sSkXQNKqnw8QjMpbOYT4VuH0q76cY85ZRTzIcffuhMjUjoQr\/33nulo4f6di2UKRg+l6FDh5r69eubVatWpeznqdDtQ1yFYSKMCHPpIAtd6EyUadq0qQy0VwqHFCR+OrXSqbY5qtDts2vXLom2X3DBBU4dZKEKnZOJm7dnz57W51y7DuKmuw\/zPdXtNSp0+2zfvl0GiSB2lwhN6AQlKCQ46aSTZMGgzc2SUYDPizJK9tE9+eSTKQV1VOj2eeWVV8Rsp7rRJUITOoUDjI5iDxX\/tD0VMwpgvhOUGzVqlMwILwoVul2wWNevXy\/TgliT7BKhCZ1JKgTiiLhj3rhSSOAyiJslDxQYpdL8o0K3C5Nfly5daipVqiRDP10iNKHTnUXHGjPi1D9PHebq4fOxP76oumkVul2IqzzwwAOmWrVq5qWXXvKuukEoQif6SPMKHwDBJS2USR2qrMhSDBw4sMjPTYVuF2JQLONgoAozBVwiFKHjnzPD\/dhjj5WKOBeG5UUFPitKYlu3bi1DJJOhQrcLxU0dO3aUAKorXWsJQhE6hQNMemVrBeWdubRjzQ\/Gjx8vedlf\/vKXSWMbKnS70KTFMBU\/ZvT7TShCp93yvvvukz1UzEZz7WnnOvh7bLShoy1Z8YwK3S64WZzmWGCuEYrQmYfWuXNnU6FCBZmcoqWv6UF847bbbjOXXXaZWb16tXf1SFTo9uCepn+DHDp1Iq4RitARN\/ngq666yvr62KgyY8YMmViSLD+rQrcHjUi0pdLHwdAQ1whc6DzpSKcxypg8ugszrqMI5nvbtm3FLCxs\/JYK3R5E2bm\/mbVAdZxrBC50CmXwXY4\/\/ngJxNleHxtVDhw4YAYMGCCnemErplXo9iCrdMstt0jQ1MU6kcCFjqnOkoZSpUrJh6Ez4jKDaPusWbNM48aNJQpfECp0exBkJrXGUEgX5ywELnTKOFnWwMQU6ts1EJc5L774onRFEdgsyHxXoduDGgdiUN27d3fyHg9c6Jgx11xzjTzp9DTPDoKarFjmVEf0+VGh2+Opp54Ss53vx0UCF\/o777xjateube666y5tZMkSHpTMI2P5RV5ennf1O1TodqAuhF4EAnEzZ870rrpFoEKnh5pqIXrQSQ+5MigvynCSs3O7TZs2R5jvKnQ74JKyDZeGrTVr1nhX3SJQoZNKw6RB6Pgw6p9nD64Q88LPOeecI2rfVeh2oNlo+PDh5tJLL5WAs4sEKnR8SppY6M\/NZJeYciS0+z766KNSgTVixAjv6kFU6HZIpNYIxqU63y9sAhU6Nx1RSNr21Gz3DxY7sOmmRYsW35vUo0K3A98HsxZIr7k6wjxQob\/55pumWbNmUtGl+AfzwocNGyarm15++WXv6kGhE\/xkH3cqLw2O+gMjv8gsUdDkKoEJHX+cJ13dunWdTTlEFdp8GRjJxhsGSCZA6CtWrDDbtm1L+qK4gxcPDCV7Fi9eLOljAnKuEpjQSTmsXLnSnH766ZISUvzlrbfekuj74fUJCL1Pnz4SGEr2YloNI7cffPBB+X1K5uCSMifg4osvdrKZJUFgQicowXpkxkdt3LjRu6r4Bat\/OM0rV65s3nvvPbmWqo9OWTLtruR+lez46quvZAUTRUzJWohtE5jQufn69esnS\/1djURGGXxslviRuuSBCir08CG1xgx3Rn2xpcVVAhM6piWDIDFpNH8eDKR1GjRoIBF4PmMVevhwn7NmjHs9ldn7tghM6ATimIjCB6AEQ6L2nV7\/jz\/+WHZyq9DDBauKOAmLFV0ekRaY0OmZpnpLI+7BQfEMgqXXP9EKrEIPl\/nz50tFHOOjXLZcAxE6\/uNjjz0med558+Z5VxW\/IeKLsAl4Uq\/A8E0VerggcNxT7neXCUToNFuwsYIc+oYNG7yrShAweJOUWpkyZUzx4sVV6CFCPQNFMsRIMOGDgKYwfP9sW7wDETobK\/gA6M9N5cZTMoeSSxb7HX300aZYsWIq9BD56KOPzM033yyVn1u2bPGu+gtDRjp16iSRffL1VOGhL9y2dAhE6FRf8RfMX4ut+A9+IU\/8qlWrmqOOOkqFHiLsrUfkXbt2DazKkO+VBzhxGIrPWM\/Ff2\/o0KHS+o0lsWfPHvlOk1GMLZ1+v6i4YrwzfiPTSwv6GX3598I94gbAR586daoM4aQUtrDXokWLJEjKiK+C\/jx9pfai5JX0JttuOWkL+plsXyeffLIIPf+L9WaMZ8NtoHOOTkbGTWPdkXbFpTu8l6HYyJEjjd8vunjYEc0W0ILe15e\/LyrkbrjhBvnymT7DKcPNV9iL97lBWMlc0J+nr9ReV199tVQmkkZm1HNBP5Ptq1y5cgUKPf+Lh3yNGjVM7969JQOD2AmKJyj2xBNPGD9fS5Yskf8YT5sePXoU+DP68v9F1Ld06dKS6aCzbeLEiUlfVNNxAhT0Z+krtRcPTcaksUWnoPf9eJUvX75AYbPHkAKpmjVrmoYNG8q+NypRsabZc4grcXgAz3cf\/csvv5Sd3uTQ+Q8q4cEXzwMW31H7\/4MFs5gVybhMuEpBkfDRETYFUaRS69evL0U6\/fv3l9Mb142CqWRtx74Lfe\/evfIXoIiANbJKeCB0UmxMoKHZQgkOmopwUTlJC5rI6xfk6LHSWNyBpTx79mzx3amKTOdh7rvQEXe3bt2khVLHR4ULQj\/hhBPEZSISqwQHsxAxmRH79u3bvav+Q1Sdeno2EmdTeee70F944QWZnUWg5\/BggBI8CJ0nPxmPwyfPKP7DGvDTTjtNzHc62FzHd6ETQOBmI8GvhAtCJwLPDcj3oHvuggPfmB70qAzv8F3o06dPl\/nWOr0kc3bs2GGWL19uFi5cKFkMimBSme+G0Mmjnnvuueb2228\/NJBC8R8eqKSPiYfY4JNPPpGBLmxupRSXCklmNK5atcrs37\/\/CP\/dV6HjR5BP5EnHUngldRAyM9spYkGsfFlkMBA5ZiIz4ooqe0ToDD8gp05V4ubNm713FD\/huyIORS2CjYUNr732mnSHcm8wvopJy4xtw13jPuEB9Pnnn3s\/fRBfhc5ThpOkZcuWgdX+xhFiGZQN07tPHz9NQYknMu+RvmFcUVGNEwidLx+zsl69elLiqvvo\/QcRMfWVQFzY9zn3CQ9w9rHjmlHKfMkll5gpU6bINQ4KXOdAhZ6YttGuXTspvFeKhtNh9+7dInL2diHM\/NFVJrZS31zYuuQECaFTFcVTnX13pDsVf9m5c6ec5hSohO0e8WDhv899w31CrQquMhY0gy\/47qmjyD8Ew1ehYz6Q98Os0WaW1MBEp6WXwguaUwpKoZCyZEEA9enJcqcJoWPiM+UVywoTT\/EXREWN++jRo484OYOG5hVc5MS\/09uA5opKZfsqdEorGWvETZZNzi+XwAqi+SfZJB4CLtRVM6o52eeaEDrMnTtX2oSnTZuWdkujkhzaRQl48hnbXAWOJThkyBBz4403Fqk3X4VOjTXtdC5vrHAJBIj\/TZkjBRiFQcCFAiRO\/mQcLnQi9wTkqKZ699135ZriD\/jBuEZBlr4WBhZdwqrDVycQx5Qb4DqnPN93\/iyNb0LnicKpdMYZZ2hqLUVoJeSzon4ZYRYEaRM+V3z4VINxgK+PD0lNtPYc+AcCIg7FQzTs6UmMTV+2bJm0xB44cEAamTgAqJmAxBASXL38loZvQscnJ\/iDr+nqjmjX4OlLBxkPR5oSCoJRQphmY8eOLXKc8OFCB\/7sJk2amAkTJji7\/C9qIDBcLaa+EAEPEwJtRPrpJaEClZoVetGpt2DaDXl0rL+CptH6JnTa4jAjSDuE\/QFEFb4QdpzTQ15QzpvGiby8PPHNU\/lM8wudCC3lyNwc3ARK9lDXTpQbK6uwh3NQUGpL6pTGFg5TLAoEzwOd+4jAK3+ngvx134SOudC+fXs5fT744APvqlIUFMkwFihxYmMa4rvzhF60aJEMH+BUTyW4mV\/onOL46BUrVjy0zUXJDirPGHrKaZqIfocJhwOZGmotgPsCa5r7Jdk94pvQKcfDH6RgRlskUwdhk4ulNwBfC7FjovHUJqrLF5gq+YUOnDwMpKD5wmaEOC4wPophD3xX+QNeLuOb0Dl98AfHjBnjXVHSARESLcUce\/XVVzOqaCtI6FTakZrDrcIVULKjb9++EnGP2uJQ34ROPTaleDpZ1B4FCZ0HBmlPBoFo9D07MI15aDLhOMge9CDwTeiYiETcly5d6l1RwqYgoQMuANZWIt+qZAYRd8Y4ERxNx6VyAV+EToDg1ltvlWmYWnJpj8KETjCPPDzDDKN2g7oEmRFSoVTGIfoo4YvQuXmIuDNVhgYMxQ6FCZ3oMHXZjRo1SlqBpyRn8eLFskQBF6igXLXL+CJ0Aj5085DIp1VVsUNhQse3pE+Z5gei+8kaY5TCIdVJ\/wB936mkO13CF6FT88ugvFGjRmkFlkUKEzpQ58CeMApowi70iAvXXnutBOP4LKOGL0JnNTJPOprfo\/akixPJhE65LU0xVHWp+Z4+jGtimAcTdqM4ossXoZNawyxcsGCBd0WxQTKhY67TR030nZ4ENd\/Tg6Yj1owR64jC1Nf8+CJ0qq7o5tE8rV2SCR2od2coCNkRxg4pqYGVSuMIsxYoDIti5WfWQscnp22PZhYdRmiXooROjTTjqGrVqiVTZpXUQOgEMU855RTZyhK1iDtkLXSaMhhZhO\/yzjvveFcVGxQldG5QzPezzjpLSjmjVKttE9wcLFYCzlEd4pG10NkDxXhnppQW1S+tBEtRQgdKN7G+CMpF0dcMG05zugnJn9PuSzt2FMla6M8++6w86ZhNpptB7JKK0BkiSPCUwFJiMolSOFg97LFjp92gQYMiu08wa6HT9E7FFUEKxS6pCB3znXFDrG0ir67R9+RweDG1hVmIjG6y0YPuB1kLnWohTHdmWSl2SUXowAnF+GjMUQJ0WvtQOHT\/EYjjRCfFFtW4RtZCv+OOO0zr1q1DH5SnHEmqQqchg8YMFutzSulAisIhlda2bVtTo0aNSFcUZi10uqJIr7EdQrFLqkJH2Hxf5cuXl5NdYyuFw8imChUqiNixfqJKVkLnaUcPOuOjUrnBlGBJVehAxyGWGL+HbIn66kfCA5GxXkcffbT0cbD0MqpkJXQ+BCLurJDVSiv7pCP0RO37McccYx555BHd5lIA+OcMUilevLhkKKh3jypZCR2\/nEJ\/JoyGvYNKOZJ0hM5pRXAJsxT3KzFVVPkOFmywdei4446TRpYoFxhlJXR6nBE6AR3W+yp2SUfowI2M73nyySfLhk4Nyn0fhmnSlkolYZTNdshK6KwTYqskZZWaorFPukLHXMdsx3xnqKeO6f4O7mdWfzPamYBllM12yEroAwcONBdeeKEUYCj2SVfoBOAIylWpUkVOdvoW9IF9EDIRbEEhBclQzahnJrISOsMGr7jiChmto9gnXaEDlXI33XSTbHPZtGmTpto8iDnNmjXLlC1bVg6yqLs1GQudG4JB9qxgKmwTqBIumQidU33lypXSa83yDW1MOgizD0kbE7+g+Sfqlk7GQsfkq1OnjpjvumvNDTIROjcwlXIs9mfApz60D0I7KltTGZEWh3bejIXO2iBmXN9\/\/\/16CjhCJkJPwHgpGl3oRsz1AZ8Im\/ZrPg8mG8eBjIW+evVqaYpgjSvFF4p9shH6c889Z6pWrWoGDx4sQblchlTa\/PnzpcaAWe5xIGOhz5gxQ3qaGfWsARw3yEbopNoYHMmOtijOLfcT\/HMGqZCNiMte+YyFzpMf0\/2ll17yrii2yUbowI72ypUry2kW9bxxNhCnYIb72WefHZtDLGOht2vXzlx00UW6gskhshU6cRdu7l69euX0\/D\/SjBxirJqOCxkL\/ZxzzpGKoV27dnlXFNtkK3RyxdRGME+OGEwuwglOAwuWDePR4kJGQif4RuCGiGSuB25cIluhAwMpzjzzTDN16lTp3so18M\/vvfde+QyojIsLGQmdSZgE4mhPpfBfcQM\/hM7vZ8EDw0S2bdvmXc0daO6hCIwejqitRk5G2kInGsv2VCqGorgnOs74IXS6EJmRRg8DqaVcG0jx\/PPPS+yJNeBxKJRJkJHQH330USmZZFlfLpp3ruKH0IGUKbv0hg0bFtnxxplA3T8Pt9q1a0s5cJxIW+g84fPy8uRE52TXHmZ38Evo+KmdOnWSFFMupU8\/\/fRTM27cOJmxsGLFCu9qPMhI6HQ70YyPP6O4g19C5+FNTp0CGiofc8V8pzima9euUjQUxdXIychI6LSmchMwH1xxB7+EDhs3bjRXXXWV7GijgSkXIKV4ySWXSDAubtWeaQudAAURSfZ3adeaW\/gpdMxYZvZzujEyLO5wX1MReN5554k1EzfSEjqBOGqi8c950uvkV7fwU+jAmCm28LBzLO4lsQzHZOsQban058eNtISO2Y64WU\/DeB1NrbmF30JnnHe3bt1kQGLcF3SwZRb\/vE2bNmbv3r3e1fiQltAJ0mzZssWUKlXKTJ8+XUc8O4bfQuf7ZgAo5izppjjllfNDlJ0d6NQQxDH4mJbQMd9IPxx77LGaQ3cQv4UOL774opzopNriOmCEBxh17QTiZs6c6V2NF2kJnRp3ViSzombt2rW63cMxghA6viunOb4rD\/c4QlEQfRuXX365TJaJI2kJ\/ZtvvpFILLui8WNyeTiBiwQhdCA4RaUc9RNxNN+JP9B2zb74uE5LSkvoiRWy9CxrxN09ghI6hVG33HKLTP2NY1vyggULxGwfPXp0bA+vtE13PhBeuVQDHRWCEjqxmblz50o1ZJx6tAH3k\/QhD7G4zIcriLSEjr9Gny7DCSioUNwiKKFzyuG7UhFJtRw72+ICY51ZMtmhQwdJscWVlIXOl02zAzl0Nkxqas09ghI6EHEfP3687CKjuy0uLFu27FBRUJx3z6UsdFr4CFoQccd8+\/rrr713FFcIUujk1Em1YeLS2RaHWnDy5cOHD5eMAksm49y8k7LQyZnz9DvqqKPMqlWrcn7Iv4sEKXTAokMY1atXlxblqEOcCbMdd4SBE3EmZaETiJs0aZKc6EwI1T509wha6JziLBxkQipp1qiDuOnCZMca49HiTMpCp66d8sAyZcrIv2sO3T2CFjowDBTTnaAs\/x5lc5d1Ypjt9NwzQivOpCx0zBz6dNlHReGM4h5hCJ3YzJIlS2RvODMDo+rCkTLs3LmzmO303sedlIVOgQw1z8xz1xp3NwlD6FhyDKJo2LChlEMTjY+idceEW4ZA4oLEbZpMQaQsdMw0VusycCKX1\/W4TBhCB9JQkydPNiVKlJCpLFE81R944AFTv359qYqL2zSZgkhJ6DyxKSwoX768rNfViLubhCV0\/HJOdaLvHTt2lNn+UTrVSRUTbW\/ZsqWkDHOBlITOB0M6pXTp0tKHHvfARVQJS+jAw\/6+++4TX52NJlE6FXfv3i3WKR1rYX1etklJ6ATfHn\/8cVO2bFkx1TS15iZhCp1TnbgNO8RZdvD+++9777gP66aqVatmFi5cmDNuaEpCZzE8vsyJJ54o3UtxriCKMmEKHTDXSbmyzGPNmjWRcekYF9W0aVPzyiuveFfiT0pCJ29OnTNfKBH3KEZZc4GwhQ5Er0m5smo5CtFrRqERW6C2PZcWhKYkdEw00hBMf1WRu4sNoeOb9+nTR1pY161bJ\/Ecl2HNFAtCcUFzIdqeICWhM7+daaCkIxR3sSF0IBhXp04dc+eddzp9qhNrog6EFDFZpFw6tFISOjfPddddJ76N4i62hI6AevbsKSJ64oknnPTVGYFFQJk4E5Nt49RTnwopCZ353mzsiEMjQ5yxJXSgjJRqud69e8v94hpE1zmoqNHHT8+1zFFKQifggmk2YcIE74riIjaFzqk+cOBAGeJA2sqlU524ARF2Cr5wL\/bv3++9kzsUKXRMns2bN5sqVarIih7FXWwKHRg31bx5c9OjRw+zY8cO76p9KNkdMWKETEeKWnGPXxQpdEwe5nlXqlRJZrkr7mJb6Nwrd999t5zqtH66MPefmg+CySwGJXeeq7MOixQ6AyHZXkGu9O233\/auKi5iW+jAqU7rJy3N7Bu3DS4FAcKSJUuaOXPm5OzSkSKFvm\/fPtnUQZFBXFfyxAUXhI5ZzEAHZsuxvouqSltwmpPuo0T39NNPlykyuVrVWaTQ2cjSr18\/U7t2bW1mcRwXhA7452wmpTuM+YK2trswJGPp0qXmpJNOEpcil3s0ihT6W2+9ZVq1aiU+juI2rggdMJc51Sm0Yqhk2FAMQ5qP+g+q9qLWSus3RQqdUsFixYpJ\/lFxG5eEztz\/vLw8U69ePTNlypTQT1N8czavVK5c2dxzzz3e1dwlJaEXL15cTHfFbVwSOrz66quyvJAFjWEH5qj9YPQZDxobFoVrFCl0Kp5q1aoleUjFbVwTOjEdTlUOCUz4sHq\/CQDOmjXLVK1aNdaLE9MhqdAJojzzzDOSWovrgvg44ZrQgRw2HWNkbTDhw4B57SwCbdasmZ7mHkmFjp8zb948+ZKefvpp76riKi4KPbHKi9HKrNvesGGD904wkELjwUKDDYdTHPe5Z0JSoVNFxHYWTPc4rOCJOy4KHShSYQIN\/jLNUexbD8Kcpr6e9c7nn3++9Mjrau\/vSCp0Jn2ya4sn8Z49e7yriqu4KnSgLXTGjBmS0yZAx4ovv8X+3HPPmSuvvFK61LAi1Df\/jqRCZz4cI4JYW8MXo7iNy0KnIo3RTX379pW1XgTJSMH5JUb2AXKv0ipLv7kWd32fpELfunWrLIhv0aKF+joRwGWhA+IjzUbPOnGfiRMnSstotmLnAYLlSdD4hhtuyInNK+mSVOj45eQiqRVW3Md1oQOFM4xxYlFj3bp1ZeML\/RSZih2rgK0rFHRhebLaW032I0kqdCKkBE94AivuEwWhA2Y8J3uXLl1kkQKLIJgLn67ViDs5f\/582aFGC+pjjz0mvefKkSQVOik1vohRo0Z5VxSXiYrQE9D8QtqNWvQhQ4aIBZlqtxvbVmbPni2nOAG4Z599NmeWMWRCoULH\/KGqCZNIi2WiQdSEDoj91ltvNTVq1JBoOWOoMO05rfO3lJKTJxPExCOCetybl19+uXTI6Ybf5BQqdPqKadQnh75o0SLvquIyURQ6EJAbO3asrGFmNiEmPYVa1MrTgUb2h6En69evl8ULPBQI5nXv3l3SaBphL5pChc5kGYpl+PBzYVF8HIiq0BMwnZUVT9RtVKxYUWrVMc0pZ8WFZKEjI804+ZcsWSL3qAbeUqNQoRPUIIKJ75RLq2uiTNSFnoAoPD73yJEjJV3GwgWi9MSKWHOsSz7TJ2kwTokWcRG64j8q9BihQlcKQ4UeI1ToSmGo0GOECl0pGGP+D6KHL9hYmf3SAAAAAElFTkSuQmCC\" y=\"0.5\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$y=x^3-3x$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$y=-x^3+3x$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$y=x^4-2x^2$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$y=-x^4+2x^2$<\/span>"],"correct":"1","level":"1","hint":"<p>\u0110\u01b0\u1eddng cong có d\u1ea1ng c\u1ee7a \u0111\u1ed3 th\u1ecb hàm s\u1ed1 b\u1eadc 3 v\u1edbi h\u1ec7 s\u1ed1 a > 0<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$y=x^3-3x$<\/span><\/span><\/p><p>\u0110\u01b0\u1eddng cong có d\u1ea1ng c\u1ee7a \u0111\u1ed3 th\u1ecb hàm s\u1ed1 b\u1eadc 3 v\u1edbi h\u1ec7 s\u1ed1 a > 0 nên ch\u1ec9 có hàm s\u1ed1 <span class=\"math-tex\">$y=x^3-3x$<\/span> th\u1ecfa yêu c\u1ea7u bài toán.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-07-07 01:21:47","option_type":"math","len":0},{"id":"5424","post_id":"7531","mon_id":"1159285","chapter_id":"1159288","question":"<p>Cho hàm s\u1ed1 b\u1eadc ba <span class=\"math-tex\">$y=f(x)$<\/span> có \u0111\u1ed3 th\u1ecb là \u0111\u01b0\u1eddng cong trong hình sau. S\u1ed1 nghi\u1ec7m th\u1ef1c c\u1ee7a ph\u01b0\u01a1ng trình <span class=\"math-tex\">$f(x)=1$<\/span> là:<\/p><p><span class=\"svgedit\"><svg height=\"230\" width=\"203\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"232\" id=\"canvas_background\" width=\"205\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><image height=\"230\" id=\"svg_1\" width=\"203\" x=\"0.5\" 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\" y=\"0\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> 2","<strong>B.<\/strong> 1","<strong>C.<\/strong> 3","<strong>D.<\/strong> 0"],"correct":"3","level":"1","hint":"<p>S\u1eed d\u1ee5ng t\u01b0\u01a1ng giao \u0111\u1ed3 th\u1ecb hàm b\u1eadc ba và \u0111\u01b0\u1eddng th\u1eb3ng y = b.<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 3<\/span><\/p><p>T\u1eeb \u0111\u1ed3 th\u1ecb hàm s\u1ed1 ta có s\u1ed1 nghi\u1ec7m th\u1ef1c c\u1ee7a ph\u01b0\u01a1ng trình <span class=\"math-tex\">$f(x)=1$<\/span> là 3 nghi\u1ec7m.<\/p><p><span class=\"svgedit\"><svg height=\"230\" width=\"203\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"232\" id=\"canvas_background\" width=\"205\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_3\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <image height=\"230\" id=\"svg_1\" width=\"203\" x=\"0.5\" 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\" 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\" y=\"1\"><\/image> <ellipse cx=\"75.92001\" cy=\"9\" fill=\"#fff\" id=\"svg_2\" rx=\"7\" ry=\"8\" stroke=\"#ffffff\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"221.92001\" cy=\"105\" fill=\"#fff\" id=\"svg_3\" rx=\"7\" ry=\"8\" stroke=\"#ffffff\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"24\" font-style=\"italic\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"69.92001\" xml:space=\"preserve\" y=\"16.35\">y<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"24\" font-style=\"italic\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"215.92001\" xml:space=\"preserve\" y=\"113.35001\">x<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"24\" font-style=\"italic\" id=\"svg_7\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"66.92001\" xml:space=\"preserve\" y=\"116.35001\">O<\/text> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$y=x^4-2x^2-2$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$y=-x^3+2x^2-2$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$y=x^3-3x^2-2$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$y=-x^4+2x^2-2$<\/span>"],"correct":"2","level":"1","hint":"<p>S\u1eed d\u1ee5ng \u0111\u1ed3 th\u1ecb hàm b\u1eadc 3.<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> <span class=\"math-tex\">$y=-x^3+2x^2-2$<\/span><\/span><\/p><p>Qua \u0111\u1ed3 th\u1ecb là hàm b\u1eadc 3 nên lo\u1ea1i A, D.<\/p><p>Bên ph\u1ea3i ngoài cùng c\u1ee7a \u0111\u1ed3 th\u1ecb \u0111i xu\u1ed1ng nên h\u1ec7 s\u1ed1 a < 0 ⇒ lo\u1ea1i \u0111áp án C.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-07-07 01:38:27","option_type":"math","len":0}]}