Math, asked by priya9570, 1 year ago

find the sum of first 25 terms if the AP 19, 28, 37

Answers

Answered by vavadiya

8

a=19. d=28-19=9. n=25

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

S25=25/2(38+24×9)

=25(19+108)

=25(127)

=3175

so

Best of luck

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