Question

Write the common difference of an A.P. whose nth term is $a_{n}$ = 3n + 7.

Answer 1

Answer:

The common difference of an A.P is 3.  

Step-by-step explanation:

Given :  

nth term ,  an = 3n + 7…….(1)

On putting n = 1 in eq 1,

a1 = 3(1) + 7  

a2 = 10

On putting n = 2 in eq 1,

a2 = 3(2) + 7  

a2 = 6 + 7

a2 = 13

On putting n = 3 in eq 1,

a3 = 3(3) + 7  

a3 = 9 + 7

a3 = 16

Common difference,d = a2 - a1

d = 13 - 10

d = 3

Hence , the common difference of an A.P is 3.  

HOPE THIS ANSWER WILL HELP YOU….

Answer 2

Answer:

Common difference is 3.

a(1)=3(1)*7

=10

a(2)=3(2)*7

=13

a(2)-a(1)=13-10

=3

I hope this will help you.