求y=(3x+2)/(x-2) (1
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
y=(2x*x-2x+3)/(x*x-x+1),求值域?
1、求y=x+3/x(x>2)最小值
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
1奥数题x-2y/x+2y=3,求x-2y/3(x+2y)-3(x-2y)/x-2y的差
x(x-1)-(x平方-y)=-3,求x平方+y平方-2xy
已知4x=9y求(1)x+y/y (2)y-x/2x
1/x-1/y=3,求2x+3xy-2y/x-y
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2^x=4^(y-1) 27^y=3^(x+1)求x-y