Math, asked by Darkblazzer, 9 months ago

solve this plz
option d) 21

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Answered by tyrbylent

0

Answer:

(b). 15

Step-by-step explanation:

If "n"th term of AP is (2n + 1), then

1st term is (2×1 + 1) = 3

2nd .... (2×2 + 1) = 5

3rd .... (2×3 + 1) = 7

3 + 5 + 7 = 15

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