[" 18.An "AP" 5,12,19,.........has 50terms."],[" It's last term is * "]

An AP 5, 12, 19, … has 50 terms. Its last term is

(i) An AP 5, 12, 19,.. has 50 terms. Find its last term. Hence, find the sum of its last 15 terms. (ii) An AP 8, 10, 12,..has 60 terms. Find its last term. Hence, find the sum of its last 10 terms.

If the sum of certain number of terms of the AP 25,22,19,........is 116, then find the last term.

The first term of an A.P. is 5 and the last term is 45. If the sum of all the terms in 400. the number of terms is

The first term of an A.P. is 5, the last term is 45 and the sum of its terms is 1000. Find the number of terms and the common difference of the A.P.

A finite AP has 21 terms . The sum of 10th, 11th and 12th term is 129 and the sum of its last three terms is 237 . Find the AP.

In an A.P., the first term is 2, the last term is 29 and sum of the terms is 155. Find the common difference of the A.P.

In an A.P., the first term is 2, the last term is 29 and sum of the terms is 155. Find the common difference of the A.P.