Core Maths 3: Integration to find a volume

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  1. jackie11's Avatar
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    Core Maths 3: Integration to find a volume
    Hi there

    Please could someone check the below, as I am getting a different answer to whats in the book;



    Many thanks
  2. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    You have substituted incorrectly on the final line
  3. jackie11's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by TenOfThem)
    You have substituted incorrectly on the final line
    Sorry to be a jummy but please could you tell me how I have gone wrong.

    Thank you
  4. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    2 squared = 4

    1/2 of 4 = 2

    2/2 = 1


    you got 1/2
  5. just george's Avatar
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    Re: Core Maths 3: Integration to find a volume
    edit: my bad ignore me im being blind sorry

    shouldnt you be integrating  (\pi x^2) dy instead of  (\pi x) dy ?
    Last edited by just george; 08-04-2012 at 12:42.
  6. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by just george)
    shouldnt you be integrating  (\pi x^2) dy instead of  (\pi x) dy ?
    she did
  7. just george's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by TenOfThem)
    she did
    I see, sorry ignore me im being blind.. happy easter
  8. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by just george)
    I see, sorry ignore me im being blind.. happy easter
    T'is the chocolate
  9. just george's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by TenOfThem)
    T'is the chocolate
    its good stuff though.. malteasters.. nomnomnom..

  10. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by just george)
    its good stuff though.. malteasters.. nomnomnom..

    I got a malteaster egg with malteaser bunnies in it
  11. Mr M's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by TenOfThem)
    I got a malteaster egg with malteaser bunnies in it
    I got a malteaser egg with malteasers in it.

  12. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by Mr M)
    I got a malteaser egg with malteasers in it.

    Was yours not a malteasTer egg ... check the box
  13. Mr M's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by TenOfThem)
    Was yours not a malteasTer egg ... check the box
    Nope.
  14. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by Mr M)
    Nope.
  15. jackie11's Avatar
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    Re: Core Maths 3: Integration to find a volume
    ok yeah I see what I did wrong, thank you

    Happy Easter to you all xxx
  16. boromir9111's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by Mr M)
    ..
    (Original post by TenOfThem)
    ....
    Do you both work at the same school?
  17. TenOfThem's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by boromir9111)
    Do you both work at the same school?
    No
  18. f1mad's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by boromir9111)
    Do you both work at the same school?
    Haha.

    Cheeky.
  19. Mr M's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by boromir9111)
    Do you both work at the same school?
    No but I've known her for about 10 years online.
  20. boromir9111's Avatar
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    Re: Core Maths 3: Integration to find a volume
    (Original post by Mr M)
    No but I've known her for about 10 years online.
    lol....ok
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