Math, asked by solanki829, 2 months ago

Find the sum of first 25 terms of the A.P 30,26,22

Answers

Answered by gaudbeenu

1

Step-by-step explanation:

S25=25÷2[2×30+(25-1)×(-4)]

=25÷2[60+24×(-4)]

=25÷2(60-96)

=25÷2×(-36)

=12.5×(-36)

S25 = -450

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