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


Tag: 时间:2024-03-16 13:29:14