Question

1/√9+√10+1/√10+√11+1/√11+√12....up to 91 terms us......

Answer 1

it is a series formed as 1/√9 + √10 + 1/√10 and so on.

upto 91 terms

it can be simplified as ∫ 1/√x + √(x+1) dx to the limits from 9 to 54 + 1/√55

solving the above integral we can have the solution.