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f(x)=x+(1)/(x) is decreasing when x in...

`f(x)=x+(1)/(x)` is decreasing when `x in`

A

`(-1,1)`

B

`(-1,0)uu(0,1)`

C

`(-oo,-1)`

D

`(1,oo)`

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The correct Answer is:
B
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