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Edexcel Mathematics: Core C1 6663 17th May 2017 [Exam Discussion] Watch

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    (Original post by Sam_99)
    Could someone clear up for me when doing sequences questions when to use the a + (n-1)d or 1/2[2a+(n-1)d]

    What key words do I need to look for so I know which one to use because I'm never completely sure.

    Thanks
    usually the question will give you a scenario. For example, Sam received £80 for his 10th birthday. Each year from then the amount he receives increases by £10 forming an arithmetic sequence....

    a question could ask 'how much does Sam receive on his 19th Birthday?' In this case you'd use a + (n-1)d.

    another question could ask 'what is the TOTAL amount of money he receives from his 10th birthday to and including his 21st birthday?' In this case you'd use 1/2[2a + (n-1)d] as you'd need to find the sum of all the money he receives from his 10th birthday to his 21st.

    Hope that made things a little clearer
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    (Original post by jayforreal18)
    Attachment 646038Here's the c12 Jan 2017 paper
    Can't open this. Please could you send again

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    (Original post by Fx85GTplus)
    Can't open this. Please could you send again

    Posted from TSR Mobile
    WMA01_01_que_20170110.pdf
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    Any predictions for what's comming up in the C1 paper on Wednesday? And do u think it's good be easy this year or difficult
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    (Original post by DamnDaniel2)
    usually the question will give you a scenario. For example, Sam received £80 for his 10th birthday. Each year from then the amount he receives increases by £10 forming an arithmetic sequence....

    a question could ask 'how much does Sam receive on his 19th Birthday?' In this case you'd use a + (n-1)d.

    another question could ask 'what is the TOTAL amount of money he receives from his 10th birthday to and including his 21st birthday?' In this case you'd use 1/2[2a + (n-1)d] as you'd need to find the sum of all the money he receives from his 10th birthday to his 21st.

    Hope that made things a little clearer
    Thats great, thank you
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    Im hoping this year will be good, after all last year's papers are the reasons why I'm resitting
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    need help on question 7 part b and c
    http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf
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    Who's resisting c1 and c2?

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    (Original post by thehaskone)
    Any predictions for what's comming up in the C1 paper on Wednesday? And do u think it's good be easy this year or difficult
    I haven't seen the proof of arithmetic progression for a while so it wouldn't surprise me if that came up.
    My teacher thinks that they might have changed whoever writes the papers, putting more people into designing the new A level papers, so the paper might be like it was last year I.E. WITH NO WHOLE NUMBERS 😥😥😥 so be prepared for that
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    (Original post by cazzers123)
    I haven't seen the proof of arithmetic progression for a while so it wouldn't surprise me if that came up.
    My teacher thinks that they might have changed whoever writes the papers, putting more people into designing the new A level papers, so the paper might be like it was last year I.E. WITH NO WHOLE NUMBERS 😥😥😥 so be prepared for that
    I did last years paper for my mock exam and I honestly dont think it was as difficult as everyone says, yes there were a lot of fractions in some questions, but as long as you have decent mental maths skills the paper wasn't to challenging
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    (Original post by Qer)
    need help on question 7 part b and c
    http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf
    Part b - keep generating the Un terms, - it will become negative in year 6

    Part c - let u1 also equal 500000 and sub it in so you get
    500,000 = 1.05 * 500000 - d
    this gives 500000 = 525000 - d
    so d = 25000
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    (Original post by physicsamor)
    Im hoping this year will be good, after all last year's papers are the reasons why I'm resitting
    No same lol, let's hope k doesn't equal 41/8 or R = 44/3 lmao
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    (Original post by candol)
    Part b - keep generating the Un terms, - it will become negative in year 6

    Part c - let u1 also equal 500000 and sub it in so you get
    500,000 = 1.05 * 500000 - d
    this gives 500000 = 525000 - d
    so d = 25000
    Thanks
    One more question
    Can you also look question 9
    Part d
    We have to find area of triangle
    I draw sketch and I used part c value as a base and 2 as a s height
    But they find BC and use this as height.....can u plz explain me this


    If you draw sketch by points given
    A -1,-2
    B7,2
    C 6,4
    You will realize what I mean
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    (Original post by JezDayy)
    No same lol, let's hope k doesn't equal 41/8 or R = 44/3 lmao
    Trust just give me nice easy questions. I haven't done that much prep at all but I'm relying on a2 maths you feel. Got a resit tomorrow and then it'll be my focus
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    (Original post by Qer)
    Thanks
    One more question
    Can you also look question 9
    Part d
    We have to find area of triangle
    I draw sketch and I used part c value as a base and 2 as a s height
    But they find BC and use this as height.....can u plz explain me this


    If you draw sketch by points given
    A -1,-2
    B7,2
    C 6,4
    You will realize what I mean
    A pleasure. these questions often lead through. Part c as a base is correct. We know angle ABC is a right angle (told in question) so we need the length of BC (using pythagoras) to then do 1/2 ab x bc
    does that help?.
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    http://www.physicsandmathstutor.com/...xcel-practice/
    Can anyone look paper 4 here
    There is question 6
    I don't understand its last part please help me
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    (Original post by Qer)
    http://www.physicsandmathstutor.com/...xcel-practice/
    Can anyone look paper 4 here
    There is question 6
    I don't understand its last part please help me
    Is it the one that says, "Find the Coordinates of D"?

    If so, as it's a regular rectangle to get from Point B to Point C you move up 8 and across 6.

    So from Point A to D (as it has the same gradient as BC). Point A is (3,0) therefore 3+8 = 11 and 0+6 = 6, so coordinates of D is (11,6)
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    (Original post by Qer)
    http://www.physicsandmathstutor.com/...xcel-practice/
    Can anyone look paper 4 here
    There is question 6
    I don't understand its last part please help me
    In short. Once you've found the co-ordinates of the point C, you'll be able to find the gradient of AD.

    Then you can just setup an equation to figure out

    11 - X = -1
    8 - X = 2
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    (Original post by BenSainsbury)
    Is it the one that says, "Find the Coordinates of D"?

    If so, as it's a regular rectangle to get from Point B to Point C you move up 8 and across 6.

    So from Point A to D (as it has the same gradient as BC). Point A is (3,0) therefore 3+8 = 11 and 0+6 = 6, so coordinates of D is (11,6)
    yeah it is
    i thought that it would be 7,6
    but it is 11,6
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    (Original post by Qer)
    yeah it is
    i thought that it would be 7,6
    but it is 11,6

    P.s. I had my coordinates wrong their.

    K has coordinates (8,10) and the gradient of AD is -1/2

    y2-y1
    ===== --> M
    x2 - x1

    So

    10 - X = -1
    8 - X = 2
 
 
 
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