Sum of A.P: Solve the given questions — task. Maths CBSE Homework Assignments, Class 10.

Answer variants:

1308

1449

If the sum of the first '\(n\)' terms of an \(A.P\). is

9 n^{2} - n

, then answer the following question.

i) What is the first number?

ii) What is the sum of first and second number?

iii) Find out the number on the 12\(^{th}\).

Did you find an error?

3. Sum of A.P: Solve the given questions