Q86 · Practice questionTechnology-freeComplex familiar4 marks
QUESTION 86 (4 marks)
For , , determine the stationary point and classify it.
WORKED SOLUTION
4 marksPractice marking scheme
ANSWER
The stationary point is and it is a local maximum.
Worked solution
. Thus at . The derivative changes from positive to negative there, so it is a local maximum; .
Differentiates correctly.
Solves to get .
Determines the point .
Classifies the point as a local maximum.
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
View the QCAA syllabusHow many marks did you earn?
Compare your working with the guide above.