Math, asked by AamenaParween, 1 year ago

Find the sum of 1st 15 multiple of 8.

Answers

Answered by gaurav2013c
8
8, 16, 24.......

a = 8

d = 8

n = 15

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

S15 = 15 /2 [ 2 × 8 + 14 × 8]

S15 = 15/2 [ 16 + 112]

S15 = 15 × 128 / 2

S15 = 15 × 64

S15 = 960
Answered by Akshaymas
2
multiples of 8 is 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120.

On adding those
we get 960.

TQ.

All the best.
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