Let f(x)={x3−x2+10x−7,x≤1−2x+log⁡2(b2−4),x>1f(x) = \begin{cases} x^3 - x^2 + 10x - 7, & x \le 1 \\ -2x + \log_2(b^2 - 4), & x > 1 \end{cases}…

Mathematics

Problem

Let f(x)={x3−x2+10x−7,x≤1−2x+log⁡2(b2−4),x>1f(x) = \begin{cases} x^3 - x^2 + 10x - 7, & x \le 1 \\ -2x + \log_2(b^2 - 4), & x > 1 \end{cases} Then the set of all values of bb , for which f(x)f(x) has maximum value at x=1x = 1 , is : (A) (−6,−2)(-6, -2) (B) (2,6)(2, 6) (C) [−6,−2)∪(2,6][-6, -2) \cup (2, 6] (D) [−6,−2)∪(2,6][-\sqrt{6}, -2) \cup (2, \sqrt{6}]

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