Question Part (b):
Prompt:
Sketch the graph of \(y=f(x)\), labelling any stationary points and axial intercepts in coordinate form.
Display type: Short answer-box
No. marks: 4
Question Part (a)
Marking step 1
Description of marks: Find the values of \(a\) and \(b\).
[1 mark for correctly expanding the expression]
[1 mark for writing out the correct simultaneous equations]
[1 mark for solving for a and b]
Option type: Multiple (checkboxes)
Marking prompt : Which of the following calculations did you perform?
Options:
- I correctly expanded the quartic equation
- I wrote two simultaneous equations: \(4a^3b=-12\) and \(4ab^3=-12a^2b^2\).
- I solved for a and b and get \(a=1\) and \(b=-3\) as my answers.
Worked solution: