梯度向量:f(x,y)=5x^4*y^2-2x*y^5
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gradf(x,y)=(∂f/∂x,∂f/∂y)
=(20x³y²-2y^5,10x^4y-10xy^4)
相关问题
梯度向量:f(x,y)=x^2+3y^2的梯度向量?
已知:f(x)=15x^4y^2-10x^3y^3+5X^2y^4,那么f(x)/5x^2y^2=________
求f(x,y)=,max{|(x-y)/(x+2y+3)|,(x+2)/(x+2y+3),(5y+4)/(x+2y+3)
4(x-5y)^2-2(4x-5y)(2x-y)-3(y-2x)^2
2X=3Y,4x-5y=2 -6x+5y=3,3x=4y 2x+3y=5,3x=y-9 3x=1-y,3x=2y-5
x^5+x^4y-2x^3y^2-x^2y^3-xy^4+2y^5
4X+2y=5Y+2X,X=?,Y=?
解下列方程组{4x-3y=5 2x+5y=9 {x+y=2 x-y=0 {x+2y=6 x-2y=-2 {5x-y=16
j计算x ^2-(4x+5y)(-5y+4x)+(-2x-7y)^2
3x+2y /4= 2x+y+2/5 = - (x+5y/3)