Math, asked by harshwardhanch48, 1 day ago

find the sum of the following AP 23,21,19....to 11 term ?

Answers

Answered by bson

0

sum = 2a+(n-1)d

a=23

d=21-23 =-2

n=11

sum = 23×2 + (10-1)*(-2) =46-18 = 28

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