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x^(3)-3x^(2)-9x+20 is...

`x^(3)-3x^(2)-9x+20` is

A

`-"ve"` for `x lt 4`

B

`+"ve"` for `x gt 4`

C

`-"ve"` for `x in (0,1)`

D

`-"ve"` for `x in (-1,0)`

Text Solution

Verified by Experts

The correct Answer is:
B
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