z=x^y+y^x求dz⼀dx

2025-01-21 09:20:33
推荐回答(5个)
回答1:

两边同时取对数,有
ln z = ylnx+xlny
上式两边对X求导,有
1/z dz/dx=y/x + lny
所以
dz/dx=(y/x + lny)(x^y+y^x)

回答2:

z=x^y+y^x
dz/dx = y*x^(y-1) + (y^x) *lny

回答3:

dz/dx
=y*x^(y-1)+lny*y^x

回答4:

z=x^y+y^x
dz/dx = y*x^(y-1) + (y^x) *lny
dz/dx
=y*x^(y-1)+lny*y^x

回答5:

先把d约去