2016 TWO(a)

Achievement
Question
Differentiate f(x)=xln(3x1)f(x)=x\ln(3x-1).
Official Answer
f(x)=ln(3x1)+x33x1f'(x)=\ln(3x-1)+x\cdot\frac{3}{3x-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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