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I struggle to understand what is asked in some A level Math exam questions!! watch

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    I'm studying AS-level maths but sometimes the wording of questions just confuses me so I don't know how to answer the questions because I don't know what is asked of me!

    Any advice?
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    Just make sure you read the question fully. Also make sure that you look at a specific topic if you find that you frequently don't know what they're asking on that specific topic.
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    (Original post by Philip-flop)
    I'm studying AS-level maths but sometimes the wording of questions just confuses me so I don't know how to answer the questions because I don't know what is asked of me!

    Any advice?
    Could you post an example, possibly?
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    If you are doing past papers, then simply take them to your teacher and ask for an explanation. You will get used to spotting and becoming familiar with them.
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    (Original post by Zacken)
    Could you post an example, possibly?
    Hi Zacken,

    It always seems to be questions like this that I have trouble with

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    (Original post by Philip-flop)
    Hi Zacken,

    It always seems to be questions like this that I have trouble with

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    For part (a), you know the volume of a cylinder formula (or if not, look it up), so you can write this down in terms of x and h, and equate it to the given value of 60, then rearrange to make h the subject.

    For part (b), you should also know the surface area of a cylinder formula, so write it down in terms of x and h, then you can substitute in your expression from (a) to get an expression just in terms of x, as required.

    For part (c), you know how to find maxima/minima using calculus: differentiate your expression for A from part (b), equate it to zero, and solve for x.

    For part (d), just substitute your value of x from part (c) into the expression for A from part (b), and evaluate it using a calculator. Then round your answer to the nearest integer as requested.

    For part (e), use the second derivative test: find d^2A/dx^2, then sub in the value of x from part (c), and confirm that the answer is positive.
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    (Original post by HapaxOromenon)
    For part (a), you know the volume of a cylinder formula (or if not, look it up), so you can write this down in terms of x and h, and equate it to the given value of 60, then rearrange to make h the subject.

    For part (b), you should also know the surface area of a cylinder formula, so write it down in terms of x and h, then you can substitute in your expression from (a) to get an expression just in terms of x, as required.

    For part (c), you know how to find maxima/minima using calculus: differentiate your expression for A from part (b), equate it to zero, and solve for x.

    For part (d), just substitute your value of x from part (c) into the expression for A from part (b), and evaluate it using a calculator. Then round your answer to the nearest integer as requested.

    For part (e), use the second derivative test: find d^2A/dx^2, then sub in the value of x from part (c), and confirm that the answer is positive.
    Wow!! thanks, that helped me out a lot!! So grateful!
 
 
 
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