Math, asked by zabiulla39, 2 months ago

find the sum of first 25 terms of an AP 2,9,16

Answers

Answered by ransubhejatin

0

Step-by-step explanation:

a=2 d=7 n=25

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

S25=25/2 (2 (2)+(25-1)(7)

=25/2(4+24x7)

=25/2 (4+168)

=25/2 (172)

=25/2×172

=25×86

S25= 2150

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