THe interval in which the function f(x) ...

THe interval in which the function `f(x) = x^(3) - 6x^(2) + 9x + 10` is increasing in

A

[1,3]

B

`(-oo,1)uu(3,oo)`

C

`(-oo,-1)uu(3,oo)`

D

`(-oo,1]uu[3,oo)`

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The correct Answer is:

B, D

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