Math, asked by ph8270371, 4 months ago

find the sum of 15 terms of an AP -3,-5,-7-9

Answers

Answered by archanayadav538

0

Step-by-step explanation:

a=-3

d=-2

n=15

a15 = a1 + (n-1)*d

= -3 + (15-1)*(-2)

=-3 + (-28)

=-31

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