2023 ONE(a)

Achievement
Question
Differentiate y=3x2y = \sqrt{3x - 2}.

*You do not need to simplify your answer.*
Official Answer
dydx=12(3x2)12×3=32(3x2)12\dfrac{dy}{dx}=\dfrac{1}{2}(3x-2)^{-\dfrac{1}{2}}\times 3=\dfrac{3}{2}(3x-2)^{-\dfrac{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
2023 NCEA L3 Calculus Exam Walkthrough by infinityplusone(starts at 0:31)
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