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Math Help - Testing LaTeX

  1. #61
    Moo
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    {\color{blue} Dark green}
    {\color{cyan} Purple}
    {\color [cmyk] {1,1,0,0.5} Brown}
    {\color{white} Dark Blue}
    {\color{green} Grey}
    {\color [cmyk] {0.75,0,0.75,0.45} Orange}
    {\color{magenta} Magenta}
    {\color{red} Green}
    {\color[gray]{0.5} Red}
    {\color{yellow} Blue}
    {\color[rgb] {.5,0,1} Yellow}
    {\color [cmyk] {0,.35,1,0} White}
    {\color [cmyk] {0.4,.75,0.8,0} Cyan}

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  2. #62
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Moo View Post
    {\color{blue} Dark green}
    {\color{cyan} Purple}
    {\color [cmyk] {1,1,0,0.5} Brown}
    {\color{white} Dark Blue}
    {\color{green} Grey}
    {\color [cmyk] {0.75,0,0.75,0.45} Orange}
    {\color{magenta} Magenta}
    {\color{red} Green}
    {\color[gray]{0.5} Red}
    {\color{yellow} Blue}
    {\color[rgb] {.5,0,1} Yellow}
    {\color [cmyk] {0,.35,1,0} White}
    {\color [cmyk] {0.4,.75,0.8,0} Cyan}

    Obviously you're bored. Go and find something constructive to do
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  3. #63
    Moo
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    I'm doing

    This was just a test... But a psy test
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  4. #64
    Member Danshader's Avatar
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    is there a software program where i can test out latex? o.o it will be messy if i keep on posting in here just to test out latex.
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  5. #65
    Moo
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    Hi Danshader,

    I know this site : LaTeX

    However, it's in French, but I think it's still understandable.
    Plus, there are some codes they don't know there, and that we use here.
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  6. #66
    Member Danshader's Avatar
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    xD it works just fine just that i don't have to put the [tex] tags
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  7. #67
    Moo
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    Of course not ^^

    And you can see that you can take the pictures of the things you've written.
    The problem is that when you validate your writing, you can't get the code back, so it's better copying before validating
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  8. #68
    Member Danshader's Avatar
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    i realized that thanks for reminding o.o"
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  9. #69
    Moo
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    Testing weird stuff

    \begin{aligned} 1 \\ 1 & 1 \\ 2 & 1 \\ 1 & 2 & 1 & 1 \\ \dots \end{aligned}


    \begin{aligned} I & =\int_0^\pi \cos(\theta) d\theta \\ &=0 \end{aligned}

    Great
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  10. #70
    MHF Contributor Mathstud28's Avatar
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    Can someone please show me where I am messing up?

    f(x)=\left\{begin{array}{cc} ax^4-2x+3,&\mbox{ if } {0<x<12}\\ bx^2+3, & \mbox{ if } {12<x<15}\end{array}\right
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  11. #71
    o_O
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    [tex]f(x)=\left\{ \begin{array}{cc} ax^4-2x+3,& \mbox{ if } {0<x<12}\\ bx^2+3, & \mbox{ if } {12<x<15}\end{array}\right.[/tex]

    Two errors indicated in red. You missed the "\" before beginning array and you need a period at the very end (for some reason you need it when dealing with \left\{ ... \right. )

    This gives :
    f(x)=\left\{ \begin{array}{cc} ax^4-2x+3,& \mbox{ if } {0<x<12}\\ bx^2+3, & \mbox{ if } {12<x<15}\end{array}\right.

    Personally, I'd align it to the left (replacing the c's with l's):
    f(x)=\left\{ \begin{array}{ll} ax^4-2x+3 & \mbox{ if } {0<x<12}\\ bx^2+3 & \mbox{ if } {12<x<15}\end{array}\right.
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  12. #72
    MHF Contributor Mathstud28's Avatar
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    Quote Originally Posted by o_O View Post
    [tex]f(x)=\left\{ \begin{array}{cc} ax^4-2x+3,& \mbox{ if } {0<x<12}\\ bx^2+3, & \mbox{ if } {12<x<15}\end{array}\right.[/tex]

    Two errors indicated in red. You missed the "\" before beginning array and you need a period at the very end (for some reason you need it when dealing with \left\{ ... \right. )

    This gives :
    f(x)=\left\{ \begin{array}{cc} ax^4-2x+3,& \mbox{ if } {0<x<12}\\ bx^2+3, & \mbox{ if } {12<x<15}\end{array}\right.

    Personally, I'd align it to the left (replacing the c's with l's):
    f(x)=\left\{ \begin{array}{ll} ax^4-2x+3 & \mbox{ if } {0<x<12}\\ bx^2+3 & \mbox{ if } {12<x<15}\end{array}\right.
    f(x)=\left\{ \begin{array}{ll} 1, & \mbox{ if } {x\in\mathbb{Q}}\\ -1 & \mbox{ if }x\in\mathbb{Q}\end{array}\right.

    Hooray!
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  13. #73
    Moo
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    Hey oO

    f(x)={4<36}

    This is the code for the last one of o_O :

    f(x)=\left\{ \begin{array}{ll} ax^4-2x+3 & \mbox{ if } {0<12}\\ bx^2+3 & \mbox{ if } {12<15}\end{array}\right.


    How come the things in red yield 12<x<15 for example ?
    And what does \right. stand for ?
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  14. #74
    o_O
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    f(x)=\left\{ \begin{array}{ll} ax^4-2x+3 & \mbox{ if } {0<12}\\ bx^2+3 & \mbox{ if } {12<15}\end{array}\right.

    That's weird .. I just copied Mathstud's code. It isn't working the second time around though ...
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  15. #75
    Super Member flyingsquirrel's Avatar
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    Quote Originally Posted by Moo View Post
    f(x)=\left\{ \begin{array}{ll} ax^4-2x+3 & \mbox{ if } {0<12}\\ bx^2+3 & \mbox{ if } {12<15}\end{array}\right.

    [...]

    And what does \right. stand for ?
    That's because every "\left" needs a matching "\right" but we don't want the right brace to appear.

    For example, with parentheses (we only keep the right one) : \left. \frac{\aleph_0}{42} \right)
    If you don't want any bracket, write \left. \frac{\aleph_0}{42} \right.
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