Product of three numbers in G.P. is 512. Find the second number.
Explanation:
Let the three numbers be a/r, a, ar.
Note: Here ‘a’ is the 2nd number.
Given, a/r × a × ar = 512.
⇒ a3 = 512 = 29
⇒ a = 23 = 8
Hence, 8.
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