IB Math HL January 2016 P2 Q6

IB Math HL January 2016 P2 Q6

12 marks
/Users/timgan/pCloud Drive/Tim Gan Math Learning Centre/Curriculum - IB/Resources - HL/Topical/REVISION 2 P2 (2016).pdf (PDF page 7-8, Paper 2 Question 6)

The figure below shows part of the graph of the function \(\mathrm{f}(x)=\dfrac{2x^2+3}{x^2-1}\).

  1. Find the equations of all asymptotes of the curve \(C\).[2]
  2. Find the range of the function.[2]
  3. Find the corresponding point \(A^{\prime}\) of the y-intercept \(A\), under the transformation \(y=\mathrm{f}(3x-1)\).[2]
  4. Determine whether \(\mathrm{f}(x)\) is even, odd or neither. Justify your answer.[2]
  5. By using the graph above, or otherwise, solve the inequality \(\dfrac{2x^2+3}{x^2-1}>x-3\).[4]

Solution:

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Answer:Asymptotes \(x=\pm1\), \(y=2\); range \(( -\infty,-3]\cup(2,\infty)\); \(A'=(\frac13,-3)\); \(\mathrm f\) is even; \(x\in(-\infty,-1)\cup(\frac{5-\sqrt{29}}2,0)\cup(1,\frac{5+\sqrt{29}}2)\).

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