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(i)1+(1+2)+(1+2+3)+………. to n terms. (i...

(i)`1+(1+2)+(1+2+3)+……….` to n terms.
(ii)`1^(2)+(1^(2)+2^(2))+(1^(2)+2^(2)+3^(2))+`………………to n terms.

Text Solution

Verified by Experts

The correct Answer is:
(i) `1/5n(n+1)(n+2)`
(ii)`1/12n(n+1)^(2)(n+2)`
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