设f(x)=10^x+lgx,则f'(1)?
问题描述:
设f(x)=10^x+lgx,则f'(1)?
答
f(x) = 10^x+lgx
f'(x) = (10^x)ln10 + 1/(xln10)
则 f'(1) = 10ln10 + 1/ln10