Question

first one to answer the question properly will be brainlist

Answer 1

Answer:

2

Step-by-step explanation:

Rationalising all the terms present in the series we get

(√2 - 1) + (√3 - √2) + (√4 - 3) ......... + (√9 - √8)

 [denominator is 1 after rationalising]

Hence only √9 - 1 remains as all the other terms are subtracted.

√9 - 1 = 3-1 = 2