设f(x)={1/x(sinx)^2,x≠0;0,x=0,则f.(0)=
设f(x)={1/x(sinx)^2,x≠0;0,x=0,则f.(0)=
A.-1
B.1
C.1/3
D.1/2
正确答案:B
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时间:2024-03-16 13:29:14