If
, find the value of
.
It is given that, 
Note:
I. Sum of first n natural numbers, 1 + 2 +3+…n,
II. Sum of cubes of first n natural numbers, 13 + 23 + 33 +…..n3,
From the above identities,
We need to find,
1
If, find the value of.
It is given that,
Note:
I. Sum of first n natural numbers, 1 + 2 +3+…n,
II. Sum of cubes of first n natural numbers, 13 + 23 + 33 +…..n3,
From the above identities,
We need to find,