若f(u,v,w)=(u-v)^w+w^(u+v) 则f(x+y,x-y,xy)=
问题描述:
若f(u,v,w)=(u-v)^w+w^(u+v) 则f(x+y,x-y,xy)=
若f(u,v,w)=(u-v)^w+w^(u+v)
则f(x+y,x-y,xy)=
答
若f(u,v,w)=(u-v)^w+w^(u+v)
f(x+y,x-y,xy)
=[(x+y)-(x-y)]^xy+(xy)^[(x+y)+(x-y)]
=(2y)^xy+(xy)^2x