Question

What is the common difference of an AP, whose nth term is an = 2n+9.​

Answer 1

Answer:

2

Step-by-step explanation:

an = 2n+9.

a1= 2(1)+9 = 2+9 = 11

a2= 2(2)+9 = 4+9 = 13

a3= 2(3)+9 = 6+9 = 15

common difference = 13-11= 2