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September 19, 2014

September 19, 2014

Posted by **Anonymous** on Friday, March 2, 2012 at 9:37pm.

What is the limit of the sequence?

- Math -
**bobpursley**, Friday, March 2, 2012 at 10:05pm1/n2 ( 1+2+3+...+ n)

=1/n^2 (n)(n+1)/2=1/n^2(n^2+n)/2

= (1+1/n)/2

check it. Let n=5

sum= 1/25 * (1+2+3+4+5)=15/25=3/5

by the formula, sum= 1/2 (1+1/5)=3/5

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