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函数f(x)=x4-x2+1在点x=1处的切线方程为( ) A.y=x+1 B....
函数f(x)=x4-x2+1在点x=1处的切线方程为( )
A.y=x+1
B.y=x-1
C.y=2x+1
D.y=2x-1
考点分析:
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