Math, asked by kkchaudharykkc, 11 months ago

The sum of how many terms of the Ap 22,20,18... Will be zero?

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Answered by Kashish236448
2

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Answered by vimal558
9
Sn = 0 ,a = 22, d= 20-22=-2

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

0 = n/2(44+(n-1)-2

0=n/2(44+(-2n+2)

0=44n-2n^2+2n

0=-2n^2+46n

2n^2=46n

n=23
so,the sum of 23 terms is 0

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