Math, asked by amruthavarshiniammuv, 6 months ago

find the sum of 1st 20 positive integers

Answers

Answered by anupama1568

2

Answer:

420

i hope it help you if it correct follow me and like the answer and mark me brainlest

Answered by xoxoxoxox

0

Answer:

sn=n÷2(2a+n−1d)

use formula

BRAINLIEST

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