If a, b, c and d are four positive real numbers such that abcd = 1, wh – McqOptions

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1.	If a, b, c and d are four positive real numbers such that abcd = 1, what is theminimum value of (1 a)(1 b)(1 c)(1 d)?
A.	4
B.	1
C.	16
D.	18
Answer» D. 18

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