如果lab-2l+(b-1)的2次幂=0,试求:1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...1/(a+2007)(b+2007)的值
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![如果lab-2l+(b-1)的2次幂=0,试求:1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...1/(a+2007)(b+2007)的值](/uploads/image/z/5281155-27-5.jpg?t=%E5%A6%82%E6%9E%9Clab-2l%2B%28b-1%29%E7%9A%842%E6%AC%A1%E5%B9%82%3D0%2C%E8%AF%95%E6%B1%82%EF%BC%9A1%2Fab%2B1%2F%28a%2B1%29%28b%2B1%29%2B1%2F%28a%2B2%29%28b%2B2%29%2B...1%2F%28a%2B2007%29%28b%2B2007%29%E7%9A%84%E5%80%BC)
如果lab-2l+(b-1)的2次幂=0,试求:1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...1/(a+2007)(b+2007)的值
如果lab-2l+(b-1)的2次幂=0,试求:1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...1/(a+2007)(b+2007)的值
如果lab-2l+(b-1)的2次幂=0,试求:1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...1/(a+2007)(b+2007)的值
lab-2l+(b-1)的2次幂=0
(b-1)的2次幂=0
b=1
lab-2l=0
la-2l=0
a=2
1/ab+1/(a+1)(b+1)+1/(a+2)(b+2)+...1/(a+2007)(b+2007)
=1/1*2+1/2*3+1/3*4+.+1/2008*2009
=1-1/2+1/2-1/3+1/3-1/4+.+1/2008-1/2009
=1-1/2009
=2008/2009