Math, asked by navya2160, 1 year ago

If the sum of the first 22 terms of AP 9,4,-1....

Answers

Answered by bodakuntalacchanna

3

Answer:

Given that,

a=9,

d=-5

the sum of first 22 terms of AP

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

S22=22/2[2(9)+(22-1)(-5)]

=11[18+21(-5)]

=11[18×-105]

=11×-1890

=-20790

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