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Edexcel AS Mathematics C2- 25th May 2016 Thread watch

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    (Original post by discuss)
    how did people find the upper bound needed to find the area of s ?
    The curve touched the X axis at two points. One of them was 0 and the other one, to find out what it was you needed to sub in y = 0 into the equation which would give you a value for x

    (Original post by Darkseid1234)
    Did anyone else get P is 66? How are people getting 120?
    When you differentiated the equation, and made it equal to 0, you get an answer of X = 16.63. If you sub that value of X back into the equation for P, you get an answer of P = 120
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    (Original post by Bhaiyattt)
    The curve touched the X axis at two points. One of them was 0 and the other one, to find out what it was you needed to sub in y = 0 into the equation which would give you a value for x



    When you differentiated the equation, and made it equal to 0, you get an answer of X = 16.63. If you sub that value of X back into the equation for P, you get an answer of P = 120
    I defo did that and got 66 and people I spoke to got similar answers as well.
    I can't remember the exact equation for P feel free to remind me but i'm sure it was 66
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    Actually the equation for P was 1000/X+X/12(4pi+36-3root3)
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    (Original post by Bhaiyattt)
    The curve touched the X axis at two points. One of them was 0 and the other one, to find out what it was you needed to sub in y = 0 into the equation which would give you a value for x



    When you differentiated the equation, and made it equal to 0, you get an answer of X = 16.63. If you sub that value of X back into the equation for P, you get an answer of P = 120
    I substituted X into a formula do you reckon i'll get a method for substituting even though it may have been the wrong formula?
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    Does anyone remember the upper bound X coordinate for the 7b integration question?
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    (Original post by 10moorej)
    Does anyone remember the upper bound X coordinate for the 7b integration question?
    I think it was 9, I think the answer was 243/10 or 24.3
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    Solutions:
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  1. File Type: pdf C2 S16 Solution (L) (1).pdf (89.9 KB, 554 views)
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    Hi I think there's a mistake in this on question 1c... The difference is definitely not 256 haha. It looks like just an oversight, accidentally putting the answer from 1B there
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    (Original post by polkadotapples)
    Hi I think there's a mistake in this on question 1c... The difference is definitely not 256 haha. It looks like just an oversight, accidentally putting the answer from 1B there
    Yh I didn't make it but I realised. I think it should be 1.602?
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    Yeah I just checked it and that's right (hopefully)
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    for the log question, how many marks out of 4 would i get if make y=2x and gettting 1.38 as the final answer.
    y^7=7y
    y^6=7
    y=1.38
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    (Original post by JAFF2400)
    This video really sums up the C2 exam...

    That was absolutely hilarious!!
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    (Original post by DreadPirateArsey)
    Here's my unofficial mark scheme, with the actual questions.
    Wow, fantastic! Thanks so much
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    2

    Posted from TSR Mobile
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    1 I mean

    Posted from TSR Mobile
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    That markscheme has actually given me confidence.
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    (Original post by DW4)
    That was absolutely hilarious!!
    Thank you so much means a lot! I'm glad you liked it
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    (Original post by Darkseid1234)
    Did anyone else get P is 66? How are people getting 120?
    (Original post by discuss)
    how did people find the upper bound needed to find the area of s ?
    (Original post by 10moorej)
    Does anyone remember the upper bound X coordinate for the 7b integration question?
    Model solutions here.
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    (Original post by JAFF2400)
    Thank you so much means a lot! I'm glad you liked it
    how the hell was 9 the upper limit . i substituted 0 into the equation and got 4 ?
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    (Original post by Bhaiyattt)
    The curve touched the X axis at two points. One of them was 0 and the other one, to find out what it was you needed to sub in y = 0 into the equation which would give you a value for x



    When you differentiated the equation, and made it equal to 0, you get an answer of X = 16.63. If you sub that value of X back into the equation for P, you get an answer of P = 120
    u don't have to make y=0 bec they already give you the x-axis which is 0,4

    and event if you make y=0 the answer will be the same 4 by using the log concept
 
 
 
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