求此函数表达式X:0 Y:0x:1 y:0x 3 y 4x 4 y 8x 5 y 16x 6 y 30x 7 y 53
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
求一个二元函数的极限lim((x^2)y+x^5)/(x^4+x^6+2(x^3)y+y^2))(x,y)->(0,0)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
已知x的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
# define ABS_MOD(x,y) (((x) < 0) ((((x) % (y)) + (y)) % (y))