Math, asked by Pikubh, 9 months ago

find the sum 82 + 80+78+...20

Answers

Answered by salilraj4254

1

Step-by-step explanation:

sum =n/2[2a+(n-1)d]. d=80-82=-2

=20/2[2*82+19*-2]

=10(164-38)

=10*126

=1260 Answer.

Answered by jitendrasingh1462890

0

Answer:

Step-by-step explanation:

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