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题目类型:[单选]
[单选] 函数y-=ƒ(x)满足ƒ(1)=2ƒ″(1)=0,且当x<1时,ƒ″(x)<0;当x>1时,ƒ″(x)>0,则有( ).
A
x=1是驻点
B
x=1是极值点
C
x=1是拐点
D
点(1,2)是拐点
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正确答案:
试题难度:
参考解析:
利用拐点的定义来确定选项.需注意的是:拐点是曲线上的点,应该是(1,2),而不是x0=1.
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