Q1 of 60 Page 21

Find the sum of the following series to n terms:

13 + 33 + 53 + 73 + ……..

nth term would be = 2n - 1

We know,


Therefore,


………….equation 1



…………….equation 2


From equation 1


=


[replace 2n by n]


=


Substituting in equation 2








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