已知/b-2/=(ab-2)^2=0,求1/(a+2007)(b+2007)+1/(a+2006)(b+2006).+1/(a+2)(b+2)+1/(a+1)(b+1)的值
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![已知/b-2/=(ab-2)^2=0,求1/(a+2007)(b+2007)+1/(a+2006)(b+2006).+1/(a+2)(b+2)+1/(a+1)(b+1)的值](/uploads/image/z/12505493-29-3.jpg?t=%E5%B7%B2%E7%9F%A5%2Fb-2%2F%3D%28ab-2%29%5E2%3D0%2C%E6%B1%821%2F%28a%2B2007%29%28b%2B2007%29%2B1%2F%28a%2B2006%29%28b%2B2006%29.%2B1%2F%28a%2B2%29%28b%2B2%29%2B1%2F%28a%2B1%29%28b%2B1%29%E7%9A%84%E5%80%BC)
已知/b-2/=(ab-2)^2=0,求1/(a+2007)(b+2007)+1/(a+2006)(b+2006).+1/(a+2)(b+2)+1/(a+1)(b+1)的值
已知/b-2/=(ab-2)^2=0,求1/(a+2007)(b+2007)+1/(a+2006)(b+2006).+1/(a+2)(b+2)+1/(a+1)(b+1)的值
已知/b-2/=(ab-2)^2=0,求1/(a+2007)(b+2007)+1/(a+2006)(b+2006).+1/(a+2)(b+2)+1/(a+1)(b+1)的值
应该是
|b-2|+(ab-2)^2=0
吧
|b-2|+(ab-2)^2=0
b-2=0
ab-2=0
a=1
b=2
1/(a+2007)(b+2007)+1/(a+2006)(b+2006).+1/(a+2)(b+2)+1/(a+1)(b+1)
=1/(1+2007)(2+2007)+1/(1+2006)(2+2006)+.+1/(1+2)(2+2)+1/(1+1)(2+1)
=1/2008*2009+1/2007*2008+.+1/3*4+1/2*3
=(1/2008-1/2009)+(1/2007-1/2008)+.+(1/3-1/4)+(1/2-1/3)
=-1/2009+1/2
=2007/4018
|b-2|+(ab-2)^2=0
b-2=0
ab-2=0
a=1
b=2
1/(a+2007)(b+2007)+1/(a+2006)(b+2006)......+1/(a+2)(b+2)+1/(a+1)(b+1)
=1/(1+2007)(2+2007)+1/(1+2006)(2+2006)+.....+1/(1+2)(2+2)+1/(1...
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|b-2|+(ab-2)^2=0
b-2=0
ab-2=0
a=1
b=2
1/(a+2007)(b+2007)+1/(a+2006)(b+2006)......+1/(a+2)(b+2)+1/(a+1)(b+1)
=1/(1+2007)(2+2007)+1/(1+2006)(2+2006)+.....+1/(1+2)(2+2)+1/(1+1)(2+1)
=1/2008*2009+1/2007*2008+......+1/3*4+1/2*3
=(1/2008-1/2009)+(1/2007-1/2008)+.....+(1/3-1/4)+(1/2-1/3)
=-1/2009+1/2
=2007/4018
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