Question

What is the sum of first five multiples of 3?​

Answer 1

Answer:

The first ten positive integer multiples of 3 are:

1 x 3 = 3

2 x 3 = 6

3 x 3 = 9

4 x 3 = 12

5 x 3 = 15

6 x 3 = 18

7 x 3 = 21

8 x 3 = 24

9 x 3 = 27

10 x 3 = 30

Step-by-step explanation:

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Answer 2

Answer:

below

Step-by-step explanation:

lets use AP formula

here

a=3

d=3

n=5

sn=n/2(2a+(n-1)×d)

=5/2(2×3+(5-1)×3)

=5/2(6+12)

=5/2(18)

=45

thus the sum will be 45