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Forming integrals in Latex

  1. Mar 13, 2008 #1
    I dont even know how to put integration signs on this someone help, this is ridiculous lol
     
    Last edited: Mar 13, 2008
  2. jcsd
  3. Mar 13, 2008 #2

    tiny-tim

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    Do you mean you want to type [tex]\int_a^b[/tex] ? :confused:

    If so, you just type [noparse][tex]\int_a^b[/tex][/noparse]. :smile:
     
  4. Mar 13, 2008 #3
  5. Mar 13, 2008 #4
    no there are no boundaries
     
  6. Mar 13, 2008 #5
    Nvm I cant even write the integral sign im not going to show all my workings
     
    Last edited: Mar 13, 2008
  7. Mar 13, 2008 #6
    [tex]\int [/tex]y^7e^y^4dy

    let u =y^7, du=y^8/8 dv=e^y^4 let w=y^4, dw=4y^3dy, 1/4dw=y^3dw

    v=1/4 [tex]=int [/tex] e^w dw
    =(y^7)(1/4e^y^4) - (1/4)(1/8) [tex]\int [/tex] y^8 e^y^4

    It doesnt seem like ive made this any simpler at all?
     
    Last edited: Mar 13, 2008
  8. Mar 13, 2008 #7

    tiny-tim

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    erm … to get
    [tex]\int y^7e^y^4dy [/tex]

    let [tex]u =y^7, du=y^8/8 dv=e^y^4 let w=y^4, dw=4y^3dy, 1/4dw=y^3dw\,,[/tex]​

    type
    [noparse][tex]\int y^7e^y^4dy [/tex]

    let [tex]u =y^7, du=y^8/8 dv=e^y^4 let w=y^4, dw=4y^3dy, 1/4dw=y^3dw\,,[/tex][/noparse]​

    You see, you must put [noparse][tex] and [/tex][/noparse] around the whole of your formula, not just the \int.

    And you must always put the \ before the int. :smile:

    I suggest you "bookmark":
     
  9. Mar 13, 2008 #8

    rock.freak667

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    [tex]\int y^7e^{y^4} dy[/tex]

    Let [itex]w=y^4 \Rightarrow \frac{dw}{dy}=4y^3 \Rightarrow \frac{dw}{4}=y^3 dy[/itex]

    [tex]\int y^7e^{y^4} dy \equiv \int (y^4)e^{y^4} (y^3 dy) \equiv \int \frac{1}{4} we^w dw[/tex]


    Easier now.
     
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