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, 2, 1, 0.5, . . . 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, 2, 1, 0.5, . . . r=      Log On


   

Question 1178481: 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, 2, 1, 0.5, . . .
r=
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

4,+2, 1, 0.5, . . .

divide second term by first term
r=2%2F4=1%2F2
divide third term by second term
r=1%2F2=1%2F2
divide fourth term by third term
r=0.5%2F1=0.5+=1%2F2

all are same , so common ratio is r=1%2F2 or r=0.5
the sequence is geometric