The Total solution for NCERT class 6-12
Find the sum to n terms of the series 12 +(12 + 22) + (12 + 22 +32) + …
Given series is 12 +(12 + 22) + (12 + 22 +32 ) + …
Finding the nth term,we have
an = (12 + 22 +32 +…….+ n2)
Now, the sum of nterms of the series can be expressed as