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If y=x^3-ax^2+12x+5 is increasing for al...

If `y=x^3-ax^2+12x+5` is increasing for all values of x, then a lies between

A

`-12,12`

B

`-11,11`

C

`-6,6`

D

`-10,10`

Text Solution

Verified by Experts

The correct Answer is:
C
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