“微信扫一扫”进入题库练习及模拟考试
下列结论中正确的是( )
A.若\( f\left(x\right)={x}^{4}\),则\({f}^{\, '}\left ( {2} \right )=32\)
B.若\( f\left(x\right)=\frac{1}{\sqrt{x}}\),则\({f}^{\, '}\left ( {2} \right )=-\frac {\sqrt {2}} {2}\)
C.若\( f\left(x\right)=\frac{1}{{x}^{2}\cdot \sqrt{x}}\),则\({f}^{\, '}\left ( {1} \right )=-\frac {5} {2}\)
D.若\( f\left(x\right)={x}^{-5}\),则\({f}^{\, '}(-1)=-5\)
参考答案:ACD