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    • Thread Starter

    Hi all, just a quick one.

    I've been going berserk with practice tests for the maths exams I've got coming up.

    One question asked me to find the derivative and second derivative of a function. I did it, and simplified the answer.

    I got it correct, but the mark scheme, for both derivatives, says for each, "correct unsimplified" for the final mark. (first derivative was 3 marks, second derivate 2 marks.)

    The question paper doesn't mention anything at all about whether I'm allowed to simplify it or not. The question literally just says:

    i) find dy/dx
    ii) find d2y/dx2

    So what's the deal?! I got both correct, but why the mark scheme only has this specific mention of 'unsimplified' - what's the difference anyway?!

    For those with a deeper interest, it's AQA PC1 Jan'10, Q3a)
    Here: http://store.aqa.org.uk/qual/gce/pdf...W-QP-JAN10.PDF
    • Community Assistant

    Community Assistant
    Your answer is fine. You just went further than you needed to.

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Updated: January 3, 2013


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