Question

If the sum of first n term of an ap is given by sn=3nsquare+ 2nfind the nth term of the AP

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

nth term of AP is 6n-1

Step-by-step explanation:

Given Equation is  

Sn= 3n^2+2n  

Let value of n=1  

S1= 3+2=5  

Let value of n=2  

S2= 3x(2)2+2x2

= 12+4

=16

Here First term S1=a= 5  

Difference d= S2-S1= 16-5=11  

nth term of AP  

Nth term Tn= a+(n-1)d  

Tn= 5+(n-1)6  

Tn= 5+6n-6  

Tn=6n-1  

Therefore nth term of AP is 6n-1