求下列函数的导数(1)y=x+1/x,(2)y=x^2cosx

2025-01-21 00:02:16
推荐回答(2个)
回答1:

1. y’=1-1/x²
2. y=(x²)‘cosx+x²(cosx)’
=2xcosx-x²sinx

回答2:

y'=1-1/x^2
y'=2xcosx-(x^2)sinx