Question

The sum of the 7 multiple of 13 is approximately

Answer 1

The answer is 354.

Hope this will help you.

Answer 2

Answer:

Step-by-step explanation:

n =7

difference = 13

an = 91

A. P = 13,26.....................91

Sn = n/2(a+an)

Sn= 7/2(13+91)

Sn= 7/2(104)

Sn = 7× 52

Sn = 364. Ans

Or

=13×1 +13×2 + 13×3 + 13×4 + 13×5 + 13×6 +13×7

13(1 + 1×2 + 1×3 + 1×4+ 1×5 + 1×6 + 1×7)

13(1+2+3+4+5+6+7)

13(28)

=364

Hope it help u

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