If the nth term of an A.P. is (3-7n), find its 10th term.

If the nth term of an A.P. is 4n-1 , find the 30th term and the sum of first 30 terms.

If n^(th) term of an A.P. is (2n - 1), find its 7^(th) term.

the 6th term of an A.P. is -10 and its 10th term -26 determine the 15 term of the A.P.

If the sum of first n terms of an A.P. is 3n^2 + 2n , find its r^(th) term.

The sum of n terms of an A.P. is n^(2) + 3n . Find its 20th term.

The sum of the 2nd term and the 7th term of an A.P. is 30. If its 15th term is 1 less than twice of its 8th term, find the A.P.

If the sum of the first n terms of an A.P. is 1/2(3n^2+7n) , then find its nth term. Hence write its 20th term.

If for every n in N , sum to n terms of an A.P. is 5n^(2)+7n then is 10th term is