二元函数问题,求f(x,y) 1.f(x+y,x-y)=2(x^2+y^2)e^(x^2-y^2)

2025-02-23 10:15:08
推荐回答(1个)
回答1:

  • f(x+y,x-y)=2(x²+y²)e^(x²-y²)

    =2·½[(x+y)²+(x-y)²]e^(x+y)(x-y)

    ∴f(x,y)=(x²+y²)e^(xy)