Math, asked by visheshsharma293, 9 months ago

4. Find the sum of first 15 multiples of 8.

Answers

Answered by suraj62111

3

Step-by-step explanation:

IT IS ABSOLUTELY 960

ANSWER IS AS FOLLOWS...

SELECT TO BRAINLIST ANSWER...

Attachments:

Answered by viji18net

0

Answer:

a = 8

n = 15

d = 8

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

= 15/2 (2×8 + (14)8]

= 15/2 [16 +112]

= 15/2 [128]

= 15 [64]

= 960

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