Question

The sum of n terms of an AP is given by the formula Sn=3n²+n,then it's 3rd term is?​

Answer 1

Answer:

n=3

Sn=3n^2+n

Sn=3×(3) ^2+3

3×9+3

27+3=30

{ ans. =30}

Answer 2

Answer:

check ✔️✔️ the attachment for answer

Step-by-step explanation: