the sum of the first n terms of an AP is 3n^2+6n. find the nth term
Answers
Answered by
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
Pls mark as Brainliest
Agnihotriisha:
Ur ans is wrong....it's ans is 6n+3
Answered by
4
hope it will be useful...
Attachments:
Similar questions