f(x)=xsinx+1的导数为什么是f′(x)=sinx+xcosx

2025-06-20 16:54:56
推荐回答(2个)
回答1:

(g(x)f(x))′=g(x)f(x)′+f(x)g(x)′

回答2:

f(x)=xsinx+1
y‘=x’sinx+sinx'*x+0
=1*sinx+cosx*x+0
=sinx+xcosx