Question

求过程，和答案，急

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

Answer 1

=2008*（1/2006-1/2007+1/2007-1/20080
=2008*(1/2006-1/2008)
=2008*[(2008-2006)/2006*2008]
=2/2006
=1/1003
看不清楚无法解答

追问

看得清了吗

你帮我这道，我就采纳

追答

=1/3+1/6+1/10+1/15+1/21+1/28+1/36+1/45+1/55
=[(20+10+6+4)/60]+1/15+1/21+1/28+1/36+1/45+1/55
=(2/3+1/21）+1/28+1/36+1/45+1/55
=（5/7+1/28）+1/36+1/45+1/55
=（3/4+1/36）+1/45+1/55
=(7/9+1/45)+1/55
=4/5+1/55
=(44+1)/55
=45/55
=9/11

Answer 2

你治好了我多年的腰椎病

Answer 3

2