Question

sum of first five odd multiples of 3 are please teller
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Answer 1

Answer:

First five multiple of 3 are:

3, 6, 9, 12, 15

Here first term, a = 3

common difference, d = 6 – 3 = 3

Number of term, n = 5

( the steps are in the above pic which is attached by me plz check it)

⇒ s5 = 9 × 5 = 45

Answer 2

Answer:

the first odd multiples are 3,9,15,21,27

3+9+15+21+27

=75

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