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What is the value of b+c if x^2+bx+c>0 only when x\in (-\infty, 2)\cup(8,\infty)?

 Sep 20, 2022
 #1
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Because \(x \in (-\infty, 2)\cup(8,\infty)\), we know when x = 2, y = 0 and when x = 8, y = 0. 

 

So, the quadratic is \((x-2)(x-8) = \color{brown}\boxed{x^2 - 10x + 16}\)

 Sep 20, 2022
 #3
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For, f(x) to be onto, codomain should be exactly equal to range.

What is range of funnction? FMC4ME FMCNA

 Sep 22, 2022

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