Question

How many terms of the AP: 9, 17, 25, ……….must be taken to give a sum of 636.

Answer 1

636= n/2(18+(n-1)8

636=n/2( 10+8n)

638=5n+4n

638=9n

n=638/9

n=70.8

Answer 2

Hey buddy here is your answer

The answer is in the attachment

Hope it helps

Please mark it as the brainliest.

Cheers

- Hermione