If the n^ th term of a sequence is 2n+5 7 , then what is the sum of its first 140 terms?

NDA 2023 Mathematics question

If the term of a sequence is , then what is the sum of its first 140 terms?

Answer: (C)

\displaystyle$ = 17[2·+5·140] = 17[19740+700] = =

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-029657