Math, asked by josna51, 1 year ago

the sum of the first n terms of an AP is 3n^2+6n. find the nth term

Answers

Answered by Saatwiik
6

Answer: 6n - 3

Step-by-step explanation:

S₁ = 3(1)²+ 6(1) = 3+6 = 9

S₂ = 3(2)² + 6(2) = 12 + 12 = 24

a₂ = S₂ - S₁ = 24 - 9 = 15

A.P. = 9 , 15 , 21 , 27 , ...........

nth term = 9 + (n-1)6

= 9 + 6n - 6 = 6n - 3

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Agnihotriisha: Ur ans is wrong....it's ans is 6n+3
Answered by harsha849
4
hope it will be useful...
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