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设f(x)=cos(1/x)则f'(2/π)=()
分类:
高等数学(一)(z0001)
发表:2024年08月09日 12时08分07秒
作者:
admin
阅读:
(2)
设f(x)=cos(1/x)则f'(2/π)=()
A、π/2
B、-(π/2)
C、π
2
/4
D、-(π
2
/4)
【正确答案】:C
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