Question

sum of 1st five multiple of 18​

Answer 1

Answer:

yes correct bgxbfbhdcnk

Answer 2

a=18

d=18

n=5

$s_{n} = \frac{n}{2} (2a + (n - 1)d) \\ s_{5} = \frac{5}{2} (36 + 72) \\ = \frac{5}{2} \times 108 \\ = 5 \times 54 \\ = 270$

•°• Sum of 1st five multiple of 18 is 270.

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