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Which of the following is a geometric sequence?
-24, 12, 6
-24, -12, 0
24, 12, 6
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geometric progression----> yn/y(n-1)=y3/2=y2/y1=q
so the forth is a geometric progression and q=1/2
if a,b,c,d is a geometric sequence then:
d c b
-- = -- = --; right?
c b a
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5 hours ago