d\dx(f(x^3))=1\x,则f'(x)=
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d\dx(f(x^3))=1\x,则f''(x)=d\dx(f(x^3))=1\x,则f''(x)=d\dx(f(x^3))=1\x,则f''(x)=因为d\dx(f(x^3))=1\x即f''(x^3)=1
d\dx(f(x^3))=1\x,则f'(x)=
d\dx(f(x^3))=1\x,则f'(x)=
d\dx(f(x^3))=1\x,则f'(x)=
因为d\dx(f(x^3))=1\x
即f'(x^3)=1/x
取x为x^(1/3)
f'{x^[(1/3)(3)]}=1/x^(1/3)
f'(x)=1/x^(1/3)