z=f(x,y)=x^3 + x^2 * y + x^2 ln(2+y)+e^(x+5) *y 求导数 dz/dx

显示全部楼层 · 2011-11-24 12:44:12

z=f(x,y)=x^3 + x^2 * y + x^2 ln(2+y)+e^(x+5) *y dz/dx=3x^2+2xy+2xln(2+y)+e^(x+5)*y =3x^2+2x[y+ln(2+y)]+e^(x+5)*y dz/dy=x^2 +x^2 /(2+y)+e^(x+5)...

千问 · 2011-11-24 12:44:12

z=f(x,y)=x3+ x2y+ x2ln(2+y)+e^(x+5)*ydz/dx=3x2+2xy+2xln(2+y)+e^(x+5)*y=3x2+2xy+2xln(2+y)]+e^(x+5)*y dz/dy=x2+[x2/(2+y)]+e^(x+5)...

千问 · 2011-11-24 12:44:12

z=f(x,y)=x^3 + x^2 * y + x^2 ln(2+y)+e^(x+5) *ydz/dx=3x^2+2xy+2xln(2+y)+e^(x+5)*y...