The algebraic form of an arithmetic sequence is `8n+7`. Find the sum of first 30 terms of this sequence.

The algebraic form of an arithmetic sequence is 6n+5. Find the sum of first 20 terms of this sequence?

What is sum of the first.20 natural numbers? ii) The algebraic form of an arithmetic sequence is 6n+5. Find the sum of the 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 algebraic form of an arithmetic sequence is 5n+5 Can the difference of any two terms of this sequence be 368? Justify.

Find the sum of first 11 terms of the sequence 20,25,30.......

The algebraic form of an arithmetic sequence is 5n+5 What is its first term?

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?

Arithmetic sequence is 1/7,2/7,3/7… What is the sum of the first 7 terms of this sequence?

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

The algebraic form of an arithmetic sequence is 3+ 2n . What is the first form of the sequence?