1.若/x-3/+y^2 =0 ,则log 2下(x^y)上 2."x=2"是方程x^2 -3x +2 =0 条件
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
方程log(2x)y=1与下列方程表示同一曲线的是 a:y=2x(x大于等于0)b:y=2x c:y=2x(x大于0)d
若x,y满足条件2x-y≥0,2x+3y≤8,y≥0,则z=x+3y的最大值为
求函数y=log(x+3) (x^2-4x+3)的定义域是?
已知log(2)[log(3)(log(4) x)] = log(3) [log(4) (log(2) y)]=0,求x
已知【x+y】/【2x+2y】=x+y/2x+2y=1/2 则x,y满足的条件是 A |x+y|>0 B m-3/m+1
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
1.若2x-3y=0,则x+y/x-y(是个分数额)=( )
已知实数x,y满足条件x≥0,y≥x,3x+4y≤12,则(x+2y+3)/(x +1)的最大值是
设实数X,Y满足条件X大于等于0,X小于等于Y,X+2Y-4小于等于,则Z=X+Y的最大值是
函数y=log(2x-1)根号下(3x-2)的定义域
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于