Question

Determine if the sequence below is arithmetic or geometric and determine the

common difference / ratio in simplest form.
12,10,8

Answer 1

We can see here, from the first term to the second term, we minus 2. From the second term to the third term, we minus 2.

So, we're constantly reducing by an amount, therefore making this sequence an arithmetic sequence.

The common difference, said above, is -2 (since if the terms are getting smaller the common difference is a negative number.)