What is the general form for a geometric sequecne?

For Example 1, which of the following are examples of arithmetic sequences? Check all that apply.

• a

• b

• c

• d

What is the general formula for the geometric sequence in Example 3.

• 9

• 6

• 4

• 0

• the 1st root

• the 3rd root

• the 5th root

• the 7th root