2023 THREE(a)

Achievement
Question
Differentiate y=ln(x2x4+1)y = \ln(x^2 - x^4 + 1).

*You do not need to simplify your answer.*
Official Answer
dydx=2x4x3x2x4+1\dfrac{dy}{dx}=\dfrac{2x-4x^3}{x^2-x^4+1}
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 52:21)
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