Question

If sum of first n terms of an ap is given by 3n^2+5n find common difference

Answer 1

Answer:

Step-by-step explanation:

Since, nth term =3n^2+5

1st term( a1)=3×1^2+5

=8

a2=3×2^2+5=3×4+5

=12+5=17

Now, common difference =a2-a1=17-8=9