Question

Sum of 1st five multiples of 3 is..​

Answer 1

Answer:

The first 5 multiples of 3 are 3, 6, 9, 12 and 15.

Hope it helps you :)

Answer 2

Answer:

45

Step-by-step explanation:

let multiples of term in AP

the ap formed is 3,6,9,12,15

where d = 3 and a = 3 and an = 15

Sn = n/2 (a +an)

S5 = 5/2 (3 + 15)

S5 = 5 * 9

Answer = 45