Question

If an=2n+1,then the common difference of the A.P is

Answer 1

Answer:

an = 2n + 1

___________

Put n = 1

⇒a1 = 2(1) + 1

⇒a1 = 2 + 1

⇒a1 = 3

Put n = 2

⇒a2 = 2(2) +1

⇒a2 = 4 + 1

⇒a2 = 5

⇒d = a2 - a1

⇒d = 5 - 3

⇒d = 2