Answers

2014-03-14T15:05:24+05:30
(2+1)(3+1)...(98+1)(99+1)(100+1)=3*4...*99*100*101
2*3*4...(100-1)= 2*3*4*...*99
3*4*..99*100*101 / 2*3*4...*99
=100*101 / 2
=50*101
=5050
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