Question 870726: insert two geometric means between 3 and 48
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! 3, 8, 20, 48
An=(n+2)*2^(n-1)
3, 12, 27, 48
An=3*n^2
not geometric but fun
3, 8, 24, 48
(square of prime) -1
2^2-1, 3^2-1, 5^2-1, 7^2-1
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