Posted by jeffrey on Sunday, April 19, 2009 at 11:37pm.
I need help!!!
3/2,1/2, 1/6,1/8,...
I need to determine if this sequence is arithmetic, geometric, or neither, then I need to find the ninth term

algebra  Reiny, Monday, April 20, 2009 at 8:10am
is (1/2)  (3/2) = (1/6)(1/2)
if yes, then arithmetic, but it isn't.
is (1/2) ÷ (3/2) = (1/6)÷(1/2)
if yes, then geometric
1/2 ÷ 3/2 = 1/3
(1/6)÷(1/2) = 1/3
but
(1/8) ÷ (1/6) = .75 (no good)
so the sequence is neither arithmetic nor geometric.
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