Question

find the sum of the 20terms of 5+10+15​

Answer 1

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YOUR ANSWER IS IN THE ATTACHMENT....

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PLEASE MARK BRAINLIEST.....

Answer 2

Answer:

a=5

d=5

n=20

$\bold{sn = \frac{n}{2} \times 2a + (n - 1)d} \\ = \frac{20}{2} \times 2(5) + (19) \times 5 \\ = 10 \times 10 + 95 \\ = 10 \times 105 \\ = {\bold{1050}} \\ hope \: it \: helps \: you...$