Find the sum of n terms of the A.P. whose kth terms is 5k + 1

given an AP whose kth term is 5k + 1

To find: the sum of n terms of an AP whose kth term is 5k + 1


So substituting k = 1 to get the first term a1 = 6


Substituting k = 2 to get the second term a2 = 11


d = a2 - a1 = 5


we know that the sum of AP is given by the formula:



substituting the values in the above equation




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