Question

Hello guys ✌ ✌ ✌
Here is your question
If the sum of first n terms of an AP is given by Sn = 3n2 +2n,
Find the nth term of the AP

Answer 1

Answer:

Step-by-step explanation:

Let n= 1

Now S1 means a1

So, S1=3+2

=5

S2= 3*2*2+2*2

=12+4

=16

Now to get a2 you subtract a1 from S2

So, 16-5=11

So d= 6

So nth term of AP=

an=5+ (n-1)*6

= 5+6n-6

= 6n-1