Question

first and last terms of A.P are a and 1. Find the sum of first 'n' terms of A.P​

Answer 1

Answer:

n/2(a+1)

Step-by-step explanation:

First term = a

Last term = 1

Sum of n terms = n/2(first term + last term)

                          = n/2(a+1)

Answer 2

Step-by-step explanation:

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