2022 ONE(a)

Achievement
Question
Differentiate y=(lnx)2y = (\ln x)^2.

*You do not need to simplify your answer.*
Official Answer
dydx=2lnx1x\dfrac{dy}{dx}=2\ln x\cdot\dfrac{1}{x}
Grading Criteria

Achievement (u)

  • Correct derivative

Merit (r)

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Excellence T1

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Excellence T2

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Video Explanation
2022 NCEA L3 Calculus Exam Walkthrough by infinityplusone(starts at 0:39)
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