Question

Determine if the sequence is arithmetic. If it is, find the common difference.12,3, -6, -15,...O ad=9OьNot Arithmeticd=-9Odd=-11

Answer 1

Solution

We have the following sequence given:

12,3, -6, -15,...

And we want to find the common difference so we can do this:

d = 3-12 =-9

d = -6-3 =-9

d= -15 -(-6) = -9

then the answer is:

c. d= -9