2022 THREE(a)

Achievement
Question
Differentiate y=e4xy = e^{4\sqrt{x}}.

You do not need to simplify your answer.
Official Answer
dydx=e4x2x12\dfrac{dy}{dx}=e^{4\sqrt{x}}\cdot 2x^{-\frac{1}{2}}
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 52:47)
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