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    (Original post by Better)
    Hey everyone.

    Something is really really bugging me and I wonder if you can help.

    I've done around 4 Solomon Press Past Papers each for C3 and C4, and the same thing keeps happening. I finish the paper, think I did great apart from a the occasional question where I will go and ask my teacher for help and then I find I make a lot of small arithmetic errors, or for example on Diagrams with Translations I may forget to put the co-ordinates.

    I find when I write my plan of attack for around 10 seconds in bullet points I usually get the answers right, but I would like to know what everyone is doing to combat this.

    It is really annoying me, and I hate wasting quality Past Paper time during my day, just to make dumb mistakes.

    But yeah anything would be great, no matter how silly it sounds! THANKS
    I used to do that quite a lot but now i make very few arithmetic errors
    all i can advice is much more practice (keep doing the papers and if you need help on a topic exercises in the book) , and gradually learning to finish papers faster so you have more time to go over questions.
    i finish papers at an average of 1 hour 10 minutes so it leaves 20 minutes to check for arithmetic errors
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    (Original post by Better)
    Hey everyone.

    Something is really really bugging me and I wonder if you can help.

    I've done around 4 Solomon Press Past Papers each for C3 and C4, and the same thing keeps happening. I finish the paper, think I did great apart from a the occasional question where I will go and ask my teacher for help and then I find I make a lot of small arithmetic errors, or for example on Diagrams with Translations I may forget to put the co-ordinates.

    I find when I write my plan of attack for around 10 seconds in bullet points I usually get the answers right, but I would like to know what everyone is doing to combat this.

    It is really annoying me, and I hate wasting quality Past Paper time during my day, just to make dumb mistakes.

    But yeah anything would be great, no matter how silly it sounds! THANKS
    Someone said that the two reasons people make careless mistakes, if that is what you are doing, is because they do more than one step at once or they misread. I read with my finger to prevent misreading, everyone's eyes cannot run along a line smoothly.
    You should know how to check your answers using a Cal. I use a TI 84 plus and so with my cal I can check if I had done almost everything right, from minimum and maximum points to finding the remainder to drawing any graph right. After you do each question check it with an alternate method using your Cal. For example to see if you have differentiated an expression correctly substitute a value in the differentiated function and find the result. Then use your Cal to find the gradient of the tangent at that point.
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    (Original post by StUdEnTIGCSE)
    Someone said that the two reasons people make careless mistakes, if that is what you are doing, is because they do more than one step at once or they misread. I read with my finger to prevent misreading, everyone's eyes cannot run along a line smoothly.
    You should know how to check your answers using a Cal. I use a TI 84 plus and so with my cal I can check if I had done almost everything right, from minimum and maximum points to finding the remainder to drawing any graph right. After you do each question check it with an alternate method using your Cal. For example to see if you have differentiated an expression correctly substitute a value in the differentiated function and find the result. Then use your Cal to find the gradient of the tangent at that point.
    Boom! Thanks so much bro!!! Two Great methods, I have the fx-991ES Plus so I think I will definitely start checking things like Gradients on my calculator more if I am feeling uncertain.

    And will start tracing with my Pencil more! I think those two will help much alot, excellent tips. Thanks so much. Using that I think I will have to do less checking at the end as well.

    If anyone else has more tips then please shoot! I will try those two methods when I start my next paper. Someone else told me a tip with Integration C4 is to differentiate what you integrated.
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    (Original post by Better)
    Boom! Thanks so much bro!!! Two Great methods, I have the fx-991ES Plus so I think I will definitely start checking things like Gradients on my calculator more if I am feeling uncertain.

    And will start tracing with my Pencil more! I think those two will help much alot, excellent tips. Thanks so much. Using that I think I will have to do less checking at the end as well.

    If anyone else has more tips then please shoot! I will try those two methods when I start my next paper. Someone else told me a tip with Integration C4 is to differentiate what you integrated.
    The fx-991ES Plus is a really good calculator, I used it in my C4 exam to check all my integration and differentiation answers by substituting in a value and seeing if the answers matched up (for indefinite integrals, I made up limits to compare my answer and the calculator's answer)

    Here's a good article to look at http://www.thestudentroom.co.uk/wiki...1ES_Calculator
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    in this question i dont understand where the (-) sign went??!! they went from -\int 4sintcost \times cosect\ dt to \int 4cost \ dt when i believe it should be -\int 4cost \ dt hence \int -4cost \ dt. need help !!
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    (Original post by masryboy94)
    in this question i dont understand where the (-) sign went??!! they went from -\int 4sintcost \times cosect\ dt to \int 4cost \ dt when i believe it should be -\int 4cost \ dt hence \int -4cost \ dt. need help !!
    what's the question?
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    (Original post by nm786)
    what's the question?
    i think you just answered it for me lool ! because in the question they say they want the positive integer which im guessing means you need to make the (-) sign negligible right?

    p.s. its part C
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    (Original post by masryboy94)
    i think you just answered it for me lool ! because in the question they say they want the positive integer which im guessing means you need to make the (-) sign negligible right?

    p.s. its part C
    Yeah i think you're correct
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    (Original post by masryboy94)
    in this question i dont understand where the (-) sign went??!! they went from -\int 4sintcost \times cosect\ dt to \int 4cost \ dt when i believe it should be -\int 4cost \ dt hence \int -4cost \ dt. need help !!
    Isn't it because if you have a negative sign in front of your integral that has limits, then it'll be the same as the positive of your integral, just with your limits swapped around.


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    (Original post by MathsNerd1)
    Isn't it because if you have a negative sign in front of your integral that has limits, then it'll be the same as the positive of your integral, just with your limits swapped around.


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    ooo i didn't see that they swapped the limits ! i get what they did now, but do you care to explain in general why if you swap the limits the sign goes away?
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    (Original post by masryboy94)
    ooo i didn't see that they swapped the limits ! i get what they did now, but do you care to explain in general why if you swap the limits the sign goes away?
    I'm not actually too sure about it myself as someone else pointed it out to me, I just remember that it does that, sorry I couldn't be of more help :-/


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    (Original post by MathsNerd1)
    I'm not actually too sure about it myself as someone else pointed it out to me, I just remember that it does that, sorry I couldn't be of more help :-/


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    dont worry about it, atleast you passed on that crucial knowledge so thank you for that
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    (Original post by masryboy94)
    ooo i didn't see that they swapped the limits ! i get what they did now, but do you care to explain in general why if you swap the limits the sign goes away?
    post your question here: http://www.thestudentroom.co.uk/show...59798&page=398 you are likely to get a better explanation.
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    argh, really struggling with c4, finding it like 10x harder than c3, vectors and substitution integration just not sinking in...hopefully i'll be able to scrape a low A.. ;/
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    Is it just me or do people have a tendency to forget what they have learned when they have finished a maths book? (Really hope I am not the only one :no: )

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    (Original post by Tackla)
    Is it just me or do people have a tendency to forget what they have learned when they have finished a maths book? (Really hope I am not the only one :no: )

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    dw mutual feelings there. i'm going over pretty much whole of binomial expansion again because i forgot it-ish. bare in mind we are humans in the end. dw you will get the hang of it when you start doing exam papers
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    (Original post by masryboy94)
    dw mutual feelings there. i'm going over pretty much whole of binomial expansion again because i forgot it-ish. bare in mind we are humans in the end. dw you will get the hang of it when you start doing exam papers
    Oh phew, nice to know I am not the only one
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    (Original post by masryboy94)
    haha yup just finished, you scared me telling me substitution is hard grrr lool its probably the easiest part for me, that and by parts. yeeh i've already done a soloman paper today, got a C, but i know where i've gone wrong so thats good, its all about practice practice practice !
    Hahah, oops. And that's a good score! You can only improve from there. By parts is definitely my favourite too. Good luck dude
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    (Original post by MathsNerd1)
    I'm not actually too sure about it myself as someone else pointed it out to me, I just remember that it does that, sorry I couldn't be of more help :-/


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    courtesy to DJMayes:

    Let the integral of f(x) be F(x). Then:

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    (Original post by nukethemaly)
    Hahah, oops. And that's a good score! You can only improve from there. By parts is definitely my favourite too. Good luck dude
    lool psht. well i hope i do improve, worried i make same mistakes and don't learn from them . integration in general is actually quite nice. thank you ! good luck to you too
 
 
 
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