已知:字母a=1,b=2,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+……1/(a+2008)(b+
已知:字母a=1,b=2,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+……1/(a+2008)(b+
已知:字母a、b满足根号a-1+根号b-2=0,求:1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+…+1
已知:字母a,b满足√a-1+√b-2=0,求1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+.1/(a+
1.已知A-B=-根号2 AB=1/3求代数式 (A-B)+A*A+B*B+AB
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
已知集合A={1,a,b}={a,a^2,ab},求a,b
已知ab=-1,a+b=2,求a/b--b/a=______
已知a+b=2,ab=1,求b/a+a/b的值
已知(3a-b+1)的绝对值+(3a-b/2)^2=0求b^2/a+b除以(b/a+b*ab/a+b)的值
已知:a-b=1,求a²-2ab+b²-a+b的值
1.已知a+b=2,a•b=-8,求a^2(a+b)-ab(a+b)+b^2(a+b)2.因式分解(xy+1
已知a(a-1)-(a*a-b)=8,求a*a+b*b/2-ab的值