Question

Find the sum of first 8 multiples of 3

Answer 1

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⇒ The multiples of three are. 3,6,9,12,15,18,21,24

Sum of the multiples=3+6+9+12+15+18+21+24
   =108


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Answer 2

A. P formed Here:-
3,6,9,12____,24
a=3
last term(l)=24
d=3
S8=n/2(a+an(or last term (L) )
S8=8/2(3+24)
S8=4(27)
S8=108

HOPE THAT HELPS
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