The-sum-of-the-first-and-last-term-of-an-A-P-is-51-And-the-sum-of-the-progression-is-255-Find-the-last-term-of-the-A-P-

Question Number 11399 by tawa last updated on 23/Mar/17

The sum of the first and last term of an A . P is 51 . And the sum of the

progression is 255 . Find the last term of the A . P .

Answered by ajfour last updated on 23/Mar/17

last term = \frac{1}{2} (51 + 9 d)

where d is whatever common

diffeeence you choose . .

number of terms n = 10

The first term a = \frac{1}{2} (51 - 9 d)

Commented by tawa last updated on 24/Mar/17

God bless you sir .

Facebook Tweet Pin