Question

What is the common difference of the following arithmetic sequence?

{15,11,7,3,...}

Answer 1

Solution : AP = 19 , 15 , 11 , 7 , 3.....

Common difference ( d ) = 15 - 19 = -4.

Answer 2

The common difference is -4.

Explanation:

Subtract a term from the next term.

11 - 15 = -4

The common difference is -4.