If the nth term of an arithmetic progression is `2n-1`, then what is the sum upto n terms?

If the nth term of an arithmetic progression is 3n+7, then what is the sum of its first 50 terms ?

If the sum of 'n' terms of an arithmetic progression is n^(2)-2n , then what is the n^(th) term?

If the n^(th) term of an arithmetic progression is (2n-1). Find the 7^(th) term.

If the nth term of an Arithmetic progression is 4n^(2)-1 , then the 8^(th) term is.

The nth term of an arithmetic progression is 3n-1. Find the progression.

The sum of the fourth and twelfth term of an arithmetic progression is 20. What is the sum of the first 15 terms of the arithmetic progression?

The sum of the fourth and twelfth term of an arithmetic progression is 20. What is the sum of the first 15 terms of the arithmetic progression?

If the n-th term of an arithmetic progression is 5n+3 , then 3rd term of the arithmetic progression is