函数z=ln(1+x2-y2)的全微分dz=______．
举一反三
- 函数z=ln(1 x2 y2)当x=1, y=2时的全微分dz= .
- 函数z=ln(1 x2 y2)当x=1, y=2时的全微分dz= .
- 函数z=e^y/x全微分dz=
- 函数\(z = {x^y}\)的全微分为 A: \(dz = y{x^{y - 1}}dy + {x^y}\ln xdx\) B: \(dz = y{x^{y - 1}}dx + {x^y}dy\) C: \(dz = y{x^{y - 1}}dx + {x^y}\ln xdy\) D: \(dz = y{x^{y - 1}}dy + {x^y}dx\)
- 函数z=xy2+y（lny-1）在x=1，y=1处的全微分dz等于（）．