Is the number sequence geometric or arithmetic?

a) [[$ 8, 24, 72, 216, … $]]



Answer: The sequence is geometric arithmetic.

b) [[$ 5, -15, 45, -135, … $]]



Answer: The sequence is geometric arithmetic.

c) [[$ 23, 26, 29, 32, … $]]



Answer: The sequence is geometric arithmetic.

d) [[$ -2, -4, -6, -8, … $]]



Answer: The sequence is geometric arithmetic.

e) [[$ \displaystyle\frac {1} {5}, \displaystyle\frac {2} {5}, \displaystyle\frac {3} {5}, \displaystyle\frac 1{3} {5}, ... $]]



Answer: The sequence is geometric arithmetic.