SOLUTION: Determine whether or not the sequence is geometric. If it is, find the common ratio r. (If an answer does not exist, enter DNE.) 4, −6, 9, − 27/2, . . . r=

Algebra ->  Trigonometry-basics -> SOLUTION: Determine whether or not the sequence is geometric. If it is, find the common ratio r. (If an answer does not exist, enter DNE.) 4, −6, 9, − 27/2, . . . r=      Log On


   



Question 1178482: Determine whether or not the sequence is geometric. If it is, find the common ratio r. (If an answer does not exist, enter DNE.)
4, −6, 9, − 27/2, . . .
r=

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
4, −6, 9, − 27/2, . . .
a2/a1 = -6/4 = -3/2
a3/a2= 9/-6=-3/2
a4/a3 = (-27/2)/9= -3/2
r ==3/2 it is a geometric progression