Question

Find the sum of first 8 multiples of 3.​

Answer 1

Step-by-step explanation:

First 8 multiples of 3 are:

1. 3×1=3
2. 3×2=6
3. 3×3=9
4. 3×4=12
5. 3×5=15
6. 3×6=18
7. 3×7=21
8. 3×8=24

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

Answer 2

Answer:

24 is answer

Step-by-step explanation:

in Ap 3,6,9,12,.....

a=3

D=3

n=8

then solve..

sn= n/2{2a+(n-1)d}

=4(6+21)

=108

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