已知/ab-2/与/b-1/互为相反数,试求代数式1/ab+1/(a+2)(b+2)+...+1/(a=2009)(b+
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/09 02:11:44
已知/ab-2/与/b-1/互为相反数,试求代数式1/ab+1/(a+2)(b+2)+...+1/(a=2009)(b+2009)的值
/ab-2/与/b-1/互为相反数
ab-2=0
b-1=0
ab=2
b=1,a=2
1/ab+1/(a+2)(b+2)+...+1/(a+2009)(b+2009)
=1/2+1/4*3+------+1/2011*2010
=1/2(1-1/2+1/2-1/3+-----+1/2010-1/2011)
=1/2(1-1/2011)
=(1/2)*(2010/2011)
=1005/2011
ab-2=0
b-1=0
ab=2
b=1,a=2
1/ab+1/(a+2)(b+2)+...+1/(a+2009)(b+2009)
=1/2+1/4*3+------+1/2011*2010
=1/2(1-1/2+1/2-1/3+-----+1/2010-1/2011)
=1/2(1-1/2011)
=(1/2)*(2010/2011)
=1005/2011
已知a与b互为相反数,且|a-2b|=3/2,求代数式(2a-ab-b*b)/(a*a+ab+b-1)的值.
|a+b+2|与|ab-1|互为相反数,求代数式a+b-ab-1的值.
已知/ab-2/与/b-1/互为相反数,试求代数式1/ab+1/(a+2)(b+2)+...+1/(a=2009)(b+
已知(a-3)2与(b-1)2互为相反数,求代数式(ab
(3)已知|ab-2|与|b-1|互为相反数,求代数式 1/(ab)+1/[(a+1)(b+1)]
已知|ab-2|与|b-1|互为相反数,试求代数式1ab+1(a+1)(b+1)+1(a+2)(b+2)+…+1(a+2
已知|ab-2|与|b-1|互为相反数,试求代数式1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+…+1/
已知|ab-2|与|b-1|互为相反数,试求代数式1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+…+1/
已知|ab-2|与|b-1|互为相反数.试求代数式1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+…+1/
已知,|ab-2|与|b-1|互为相反数,试求代数式:1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+.1
已知|ab-2|与|b-1|互为相反数试求代数式1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...+1
已知|ab-2|与|b-1|互为相反数,试求代数式1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+.+1/