Asked by andrew
f(x)=[lnx]^5
Answers
Answered by
bobpursley
let u= lnx
f(u)=u^5
f'= 5u^4
but df(x)/dx= df(u)/du* du/dx
so
f'(x)= 5(lnx)^4 * 1/x
f(u)=u^5
f'= 5u^4
but df(x)/dx= df(u)/du* du/dx
so
f'(x)= 5(lnx)^4 * 1/x
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