Question

For each sequence, determine whether it appears to be arithmetic.If it does, find the common difference.-7, -11, -15, -19, ...ArithmeticCommon difference:O Not arithmeticd = 0

Answer 1

Notice that:

`\begin{gathered} -11=-7-4. \\ -15=-11-4, \\ -19=-15-4. \end{gathered}`

Therefore the given sequence represents an arithmetic sequence, and its common difference is -4.

Answer: Arithmetic.

Common difference d=-4.