# mathematics

A goemetric progression is such that the 3rd term is 9times the first term ,while the 2nd term is one-twenty fourth of the 5th term.Find the 4th term

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1. ar^2 = 9a
so, r = 3 or -3

24*ar = ar^4
24 = r^3
huh? I thought r^3 was 27.
I suspect a typo.

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👨‍🏫
oobleck
2. ar^2=9a
ar^2/a=9a/a
r^2=9
r=√9
r=3 or -3

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