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