已知|xy-2|与丨y-1丨互为相反数,试求代数式 1 /xy+1/(x+1)(y+1)+已知|xy-2|与丨y-1丨互为相反数,试求代数式1 /xy+1/(x+1)(y+1)+1/(x+2)(y+2)+……+1/(x+2011)(y+2011)的值
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已知|xy-2|与丨y-1丨互为相反数,试求代数式1/xy+1/(x+1)(y+1)+已知|xy-2|与丨y-1丨互为相反数,试求代数式1/xy+1/(x+1)(y+1)+1/(x+2)(y+2)+…
已知|xy-2|与丨y-1丨互为相反数,试求代数式 1 /xy+1/(x+1)(y+1)+已知|xy-2|与丨y-1丨互为相反数,试求代数式1 /xy+1/(x+1)(y+1)+1/(x+2)(y+2)+……+1/(x+2011)(y+2011)的值
已知|xy-2|与丨y-1丨互为相反数,试求代数式 1 /xy+1/(x+1)(y+1)+
已知|xy-2|与丨y-1丨互为相反数,试求代数式
1 /xy+1/(x+1)(y+1)+1/(x+2)(y+2)+……+1/(x+2011)(y+2011)的值
已知|xy-2|与丨y-1丨互为相反数,试求代数式 1 /xy+1/(x+1)(y+1)+已知|xy-2|与丨y-1丨互为相反数,试求代数式1 /xy+1/(x+1)(y+1)+1/(x+2)(y+2)+……+1/(x+2011)(y+2011)的值
|xy-2|=0 x=2
丨y-1丨=0 y=1
1 /xy+1/(x+1)(y+1)+1/(x+2)(y+2)+……+1/(x+2011)(y+2011)
=1/2+1/(3*2)+.1(2013*2012)
=2011/4026
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