已知实数a.b.x.y满足x+|y-3|=1-厂a ; x-|y-3|=1+厂b 求厂x+y 加厂ab的值!

已知实数x,y满足约束条件x+y>3,y 已知实数x,y满足x-y 已知实数X,Y满足{|x+y| 几道比例线段题目已知两实数a,b满足a^2-4ab+4b^=0,求(a+b)/a已知x/2=y/3,求(x-y)/y ,(x+y)/y ,(x+y)/(x-y) 已知实数x,y满足：y 已知实数a,b,x,y,满足不等式（a+b）(x+y)>2(ay+bx),求证（x-y）/(a-b)+(a-b)/(x-y)>=2 已知实数x,y满足3^x+5^y>3^(-x)+5^(-y),则下列式子成立的是( )A.x+y＞0 B.x+y＜0 C.x-y＞0 D.x-y＞0 已知向量a,b不共线实数x,y满足等式3xa+(10-y)b=2xb+(4y+7)a,求x,y的值 已知向量a,b不共线实数x,y满足等式3xa+(10-y)b=2xb+(4y+7)a,求x,y的值 已知实数a,b,x,y满足a+b=x+y=2,ax+by=5,则 已知：实数a、b、x、y满足a+b=x+y=3,ax+by=7 求（a*a+b*b）xy+ab（x*x+y*y）如题 实数a,b和x,y满足条件a 实数a,b,c,x,y,z满足a 已知向量a,b不共线,实数x,y满足（3x-4y)a+(2x-3y)=6a+3b,则x-y的值为 A.3 B.-3 C.0 D.2 已知实数X,Y满足2 已知实数xy满足x+2y 已知实数x、y满足-1 已知实数x,y满足：1