Question

The sum of first n terms of an AP Sn=3n&3-4n, then its nth term is​


no samp

Answer 1

Answer:

Step-by-step explanation:

Given S  

n

​

=5n  

2

+3n

S  

n−1

​

=5(n−1)  

2

+3(n−1)

=5(n  

2

−2n+1)+3n−3

=5n  

2

−10n+3n+5−3

=5n  

2

−7n+2

T  

n

​

=S  

n

​

−S  

n−1

​

 

=5n  

2

+3n−5n  

2

+7n−2

=10n−2