The set of values of $x$ for which $f(x)=3 x^4-8 x^3-6 x^2+24 x-12$ is an increasing function, is

The set of values of $x$ for which $f(x)=3 x^4-8 x^3-6 x^2+24 x-12$ is an increasing function, is
  1. $(-\infty,-1) \cup(1,2)$
  2. $(-1,2)$
  3. $(-1,1) \cup(2, \infty)$
  4. $\mathbb{R}$

Solution

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Asked in: AP EAMCET 2018 (24 Apr Shift 2)

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