Question

. How many terms of the AP 9, 17, 25, ... must be taken so that their sum
is 6362
(CBSE 2017]​

Answer 1

hey buddy.......

thanks for the question.....

AP is 9, 17, 25, .........

d=17-9=8

n=?

Sn=n/2[2a+(n-1)d]

6362= n/2[2×9+(n-1)8]

6362=n/2[18+8n-8]

6362=n×5+8n

6362=13n

n=489.38

hope it helps mark me as brainliest...

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:)