A) \[[2,3]\]
B) \[[1,2]\]
C) \[x\ge -1\]and \[x\in \left( -\infty ,1 \right)\cup \left( 2,\infty \right)\]
D) \[\left( -\infty ,1 \right)\cup \left( 2,\infty \right)\]
Correct Answer: D
Solution :
(d): General solution for \[(x-a)(x-b)\ge 0\]\[b>a\,;\] when roots are ?a? and ?b? is given as\[x\in (-\infty ,a)\cup (b,\infty )\]. The specific solution here (given a = 1, b = 2) becomes\[x\in (-\infty ,1)\cup (2,\infty )\]
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