若|a-1|+|ab-2|=0,求1/ab+1/(a+1)*(b+1)+1/(a+2)*(b+2)···1/(a+200
已知a+b=A,ab=A+2008,1-2(a+ab)+(ab-2b)=3A.求a+b和ab的值
若|a+1|+|b+2|=0,求:(1)a+b-ab;(2)a分之b+b分之a·
求证:A/(AB+B^2)-B/(AB+A^2)=1/B-1/A
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
若/a-1/+(b+2)^2=0,A=3a^2-6ab+b^2,B= -a^2-5,求A-B的值.
(a+b)²+|b-1∕3|=0 求(5a²b-2ab²-3ab)-(2ab+5a
若集合{0,a^2,a-b}={1,a,ab}求b-a的值
ab(a+b)2-(a+b)2+1即 ab(a+b)平方-(a+b)平方+1 分解因式
如果有理数a、b满足|ab-2|+|1-b|=0,试求1/ab+1/(a+1)(a+1)+1/(a+2)(a +2)+.
已知√a-1+(ab-2)^2=0,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+.+1/(a+200
若,a、b为有理数,且|a-1|+(ab-2)²=0,求:ab分之1+(a+1)(b+1)分之1+(a+2)(
已知|a-2|+b²+2b+1=0,求a²+ab/(a+b)²