If ${a_1},{a_2},....{a_n}$ are positive real numbers whose product is a fixed number $c$, then the minimum value of ${a_1} + {a_2} + ...$ $ + {a_{n - 1}} + 2{a_n}$ is
If ${a_1},{a_2},....{a_n}$ are positive real numbers whose product is a fixed number $c$, then the minimum value of ${a_1} + {a_2} + ...$ $ + {a_{n - 1}} + 2{a_n}$ is
- [IIT 2002]
- A
$n{(2c)^{1/n}}$
- B
$(n + 1)\,{c^{1/n}}$
- C
$2n{c^{1/n}}$
- D
$(n + 1){(2c)^{1/n}}$
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