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Question 1
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If $a_1, a_2,...a_n$ are positive real numbers whose product is a fixed number c, then the minimum of $a_1, a_2, ....2a_n$ is
A.
$n(2c)^{1/n}$
B.
$(n+1)c^{1/n}$
C.
$\frac{(2n)!}{(n!)^2}$
D.
$(n+1)(2c)^{1/n}$
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