Question

The common difference of an A.P. whose 3rd term is 5 and 7th term is 9 is .....​

Answer 1

Answer:

1

Step-by-step explanation:

Let a be the first term and common difference be x,

3rd term = a + 2x = 5   equation (1)

7th term = a + 6x = 9   equation (2)

Therefore subtracting (1) from (2),

     4x = 4

       x = 1

Common Difference = x = 1

Answer 2

Answer:

1

Step-by-step explanation:

1 is the answer