2016 ONE(a)

Achievement
Question
Differentiate y=1+x1x+1x2y = 1 + x - \frac{1}{x} + \frac{1}{x^2}.
Official Answer
dydx=1+x22x3\dfrac{dy}{dx}=1+x^{-2}-2x^{-3}
Grading Criteria

Achievement (u)

  • Correct solution

Merit (r)

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Excellence T1

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Excellence T2

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