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April 28, 2015

Homework Help: pre-calculus

Posted by yumi on Sunday, March 3, 2013 at 3:38pm.

proving tht the statements are true for all natural numbers

1+2+3+....+n=n(n+1)/2

i dont understand when trying to prove tht P(k+1) = 1+2+3+...+k+k(k+1)= 1/2

how do you do this step???

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