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Find the critical points of the function f(x) `=4x^(3)-6x^(2) -24x+9 " if f(i) x in [0,3] (ii) x in [-3,3] (iii) x in [-1,2]`

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`f(x) =12x^(2)-12x -24`
`f(x) =0" "rArr" "x=-1,2`
`f(-1) =23 ,f(2)=-31`
`(-1, 23),(2,-31)` are stationery points
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RESONANCE-APPLICATION OF DERIVATIVES-High Level Problems (HLP)
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