Question

the common difference of an AP , whose nth term is an = (3n+7)​

Answer 1

Step-by-step explanation:

an=3n+7

a1=3×1+7

=3+7=10

a2=3×2+7

=6+7

=13

d =a2-a1

= 13-10

=3

hence common difference , d=3

Answer 2

Answer:

if n th term is given

then, a=3×1+7

=10

t2=3×2+7

=13

therefore d = t2-a

=13-10

= 3