Q218 · Practice questionTechnology-freeComplex familiar5 marks
QUESTION 218 (5 marks)
For , solve .
a)[2 marks]
Factor the equation in .
b)[3 marks]
Find all solutions in the interval.
WORKED SOLUTION
5 marksPractice marking scheme
ANSWER
gives ; gives .
Worked solution
Part (a): , so or .
Part (b): gives ; gives .
Part (a): completes the requested reasoning and obtains a correct result.
Part (b): completes the requested reasoning and obtains a correct result.
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