y=xe^-2x

求解

y=2+xe^y,求dy=? 求y=xlnx y=xe＾x y=x＾x的二级导数 (x+y)(x-y)=(x+y)2 3(x+y)(x-y)+4(x-y)^2=? (x+y)^2×(x-y)^2=? 函数y=1+xe^y 求二阶导数的问题 x(x-y)(X^2-xy-y^2)-x^2y(y-x)=多少 x+2y=2x+y+1=7x-y 求：2x-y? 已知：X*X+Y*Y=34，X-Y=2，则X/Y= 3(x+y)-2(x-y)=9 5(x+y)+2(x-y)=-1