Math, asked by kashyap119, 11 months ago

FIND THE SUN THE FIRST 15 MULTIPLE OF 8.

Answers

Answered by LostMagician
5

it's 960

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Answered by kbalasaheb702
0

Answer:

Step-by-step explanation:a=8,d=8,n=15,Sn=?

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

=15/2 (2(8)+(15-1)8)

=15/2 (16+14x8)

=15/2 (16+112)

=15/2 x 128

=15x64. (128/2=64)

=960.

The sum of first 15 multiples of 8 is 960.

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