Sum of first n terms of an arithmetic sequence is `8n^2`+5n.Write the algebraic expression of the sequence.

Sum of first n terms of an arithmetic sequence is 8n^2 +5n. Find the sum of first 20 terms.

The sum of first n terms of an arithmetic sequence is n^2+2n What is the first term?

The algebraic form for the sum of first n terms of an arithmetic sequence is 2n^(2) +8n'. How many consecutive terms of the sequence, starting from the first, are to be added to get 330 ?

The sum of first n terms of an arithmetic sequence is n^2+2n What is the sum of first 20 terms of this sequence?

Algebraic form of an arithmetic sequence is 6n+3 a) Find the sum of first 20 terms of the sequence: b) Write the algebraic expression of the sum.

The sum of first n terms of an arithmetic sequence is n^2+2n Find the common difference.

Sum of the algebraic form of an arithmetic sequence is 4n^(2)+5n . Write the sequence.

The 8^(th) term of an arithmetic sequence is 12 and its 12^(th) term is 8.What is the algebraic expression for this sequence?

What is the sum of first 20 natural. numbers? b) Find the sum of .first 20 terms of 4,8 , 12,.... c) If 3 is added to each term in the above sequence, write down the algebraic expression of the new sequence. d) Find the sum of first 20 terms of the new sequence.

The terms in two positions of an arithmetic sequence is given below. Write the first five terms of the sequence. 2^(nd) term 5, 5^(th) term 2