若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
求函数y=\x-1\+\x-2\+\x-3\+\x-4\+\x-5\+\x-6\+.+\x-10\的最小值
若|y+5|+(5x+1)^2=0,求-3(2x-y)-{7x-[6x+2y-(10x-8y)]-x-2(3x-4y)}
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
若5x+3y=3x+4y=x+2y+6,则x+y=___
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于