Find the sum of last ten terms of the AP 8, 10, 12, …, 126.

Question

Philoid · Accepted Answer

First term, a = 8

Common difference, d = 10 - 8 = 2

For finding, the sum of last ten terms, we write the given AP in reverse order.

i.e., 126, 124, 122, …., 12, 10, 8

and First term A = 126 and Common difference D = - 2

Sum of ten terms of new AP is