Question

Find the common difference of the arithmetic sequence − 19 , − 11 , − 3

Answer 1

+ 8

Explanation:

This is an arithmetic progression (AP) as there is a common difference between successive terms.

For example, looking at the first two terms,

Difference = 2nd term - 1st term

= -11 -(-19)

= -11 + 19

= +8

To check,

Looking at the second and third terms,

Difference = 3rd term - 2nd term

= -3 -(-11)

= -3 + 11

= +8

Hence, there is a common difference of +8 between consecutive terms, making it an AP.