Time remaining:
use gauss approach to solve problem arithmetic sequence

Algebra
Tutor: None Selected Time limit: 1 Day

1+2+3+4+..98 using n/2

Nov 26th, 2014

1+98=99

n/2=98/2=49

99 x 49=4851

Nov 26th, 2014

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Nov 26th, 2014
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