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已知函数f(x)的图象过点(0,-5),它的导数f/(x)=4x3-4x,则当f...
已知函数f(x)的图象过点(0,-5),它的导数f/(x)=4x3-4x,则当f(x)取得极大值-5时,x的值应为( )
A.-1
B.0
C.1
D.±1
考点分析:
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