2024 ASRJC Promo Q4

2024 ASRJC Promo Q4

7 marks
Promo
  1. Sketch the graph of \(y=\frac{4-x}{2+3x-2{{x}^{2}}}\). Give the equations of the asymptotes and the coordinates of the point where the curve intersects the \(x\)-axis.[4]
  2. Solve the inequality \(\frac{4-x}{2+3x-2{{x}^{2}}}>0\).[1]
  3. Hence solve the inequality \(\frac{4-\left| x \right|}{2+3\left| x \right|-2{{x}^{2}}}>0\).[2]

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Answer: (a) Asymptotes are \(y=0\), \(x=2\), \(x=-\frac{1}{2}\) (b) \(-0.5< x < 2\) or \( x > 4\) (c) \(-2 < x < 2\) or \( x < -4\) or \(x > 4\)

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