Question

The list of numbers 5, - 2, -9, -16 ... is ___.

• A. An AP with d = -7
• B. An AP with d = 7
• C. An AP with d = 3
• D. Not an AP

Answer 1

The correct option is A An AP with d = -7

We know that for a set of numbers to form an AP, the difference between any two consecutive terms must be constant.

Here, in the given list of numbers, we can easily see that between any two consecutive terms, there exist the same difference of -7. Hence the list of numbers is in AP.