Math, asked by Rashingdane, 1 year ago

In an AP, if a=1, an=20 and Sn=399, find n.

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Answered by srushti2

4

this I the right answer . u can trust me

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Rashingdane: Thankyou very very very very much......I was trying to get this answer since yesterday.

srushti2: no problem friend

srushti2: I m help full

Answered by adeeladilu2

0

ur answer is attached above....

stay safe ND have a nice day.....

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