Question

If Sn, the sum of first n terms of an AP is given by Sn=5n2+3n2 then find its nth term​

Answer 1

Answer:

5n²+3n²=(8n)²

It is the answer.

Answer 2

Answer:

16n - 8

Step-by-step explanation:

Sₙ = 5n² + 3n²

For n = 1,

Sₙ = 5 + 3 = 8

⇒ a = 8

For n = 2,

Sₙ = 3(2)² + 5(2)²

    = 3 ₓ 4 + 5 ₓ 4 = 32

⇒ a + a + d = 2a +d = 32

∴ d = 16

aₙ = a + (n-1)d

   = 8 + (n-1)16 = 16n - 8

Please mark as brainliest if you found it helpful!!!