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Question

The minimum value of x2, if x(3, 5] is

A
\N
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B
9
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C
-9
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D
4
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Solution

The correct option is A \N
x(3, 5]3x5x2 is always a nonnegative number.x2 takes value 0 when x = 0. As 0 [3, 5], the minimum value of x2 is 0.

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