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![[Post New]](/templates/default/images/icon_minipost_new.gif) 26 Jun 2008 15:42:32 IST
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this is
7(1+11+111..............111...n tyms)
=7/9(9+99+999...........n terms)
7/9(10-1+100-1........n terms)
=7/9[{10(10^n-1)/9}-n]
dats it!
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nobody is wrong
even a stopped clock is right twice a day |
this reply: 15 points
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