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The interval in which the function f(x)=...

The interval in which the function `f(x)=2x^(3)-9x^(2)+12x-15` is increasing, is :

A

(1,2)

B

`(-oo,1)uu(2,oo)`

C

`(-oo,1)`

D

`(2,oo)`

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EDUCART PUBLICATION-SAMPLE PAPER 11 -SECTION- B
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