SOLUTION: -64, 32,-16, 8,-4 is this sequence geometric, arithmetic, or neither

Algebra ->  Sequences-and-series -> SOLUTION: -64, 32,-16, 8,-4 is this sequence geometric, arithmetic, or neither      Log On


   

Question 42187: -64, 32,-16, 8,-4
is this sequence geometric, arithmetic, or neither
Answer by psbhowmick(878) About Me  (Show Source):
You can put this solution on YOUR website!
Let us denote the first term by 't1', second term by 't2' and so on.

t2%2Ft1=32%2F%28-64%29=-1%2F2
t3%2Ft2=%28-16%29%2F32=-1%2F2
t4%2Ft3=8%2F%28-16%29=-1%2F2
t5%2Ft4=%28-4%29%2F8=-1%2F2

So, clearly, the numbers are in G.P. or Geometric Progression with common ratio -1%2F2.