Is the sequence -24, 12, 6 a geometric sequence?

1 Answer
Aug 10, 2015

Answer:

No, since there is no common ratio maintained across the sequence, the given sequence isn't geometric.

Explanation:

The sequence given is:
#-24, 12 , 6# ...

To check if it is a geometric sequence we calculate the common ratio #r# (which is a constant ratio maintained throughout the sequence).

#r# is obtained by dividing a term by its preceding term:

1) #r_1 = 12/-24=-1/2#

2) #r_2 = 6/12 = 1/2#

For this sequence the ratios # r_1 != r_2# so the sequence is not geometric.