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y=(x)/(3)+(3)/(x) decreases in...

`y=(x)/(3)+(3)/(x)` decreases in

A

`(- infty, -3)`

B

`(3, infty)`

C

`(- infty , -3) uu(3, infty)`

D

`(-3, 3)`

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The correct Answer is:
D
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