f(x)=lnx+2^x/x^2

问题描述:

f(x)=lnx+2^x/x^2

f'(x)=(lnx)'+((2^x)(x^(-2)))'=1/x+(2^x)'(x^(-2))+(2^x)(x^(-2))'=1/x+(2^x)ln2/(x^2)-(2^(x+1))/(x^3)