设f(2x+1)=e^x,求f'(x),f'(lnx)
问题描述:
设f(2x+1)=e^x,求f'(x),f'(lnx)
答
f(2x+1)=e^x
f(x)=e^[(x-1)/2]
f'(x)=[(x-1)/2]'f(x)=x/2*e^[(x-1)/2]
然后令X=lnx就行