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If the function f(x)=(a+3)x^3+(a-3)x^2+4...

If the function `f(x)=(a+3)x^3+(a-3)x^2+4(a-4)x+5` has maxima at some `x\ in R^-` and a minima at some `x\ in R^+` , find the possible values of `adot`

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