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Math Help - just testing

  1. #16
    MHF Contributor Drexel28's Avatar
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    Quote Originally Posted by Soroban View Post
    Captions?



    . . ]
    Hahahahahahaha, I am sorry. That was very clever.
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  2. #17
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    Talking my first latect testing

     <br /> <br />
1+1 = 4/2<br /> <br />

    --------------------------
    <br /> <br />
1+2 = 3<br /> <br />
    Last edited by nikk; January 31st 2010 at 01:42 AM.
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  3. #18
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    Hello, nikk!

     1+1 = 4/2

    You can get a "prettier" result with \frac{4}{2}: . \frac{4}{2}

    With practice you can create: . \frac{\dfrac{1}{4} - \dfrac{1}{x^2}}{\dfrac{1}{2} - \dfrac{1}{x}} \;=\;\frac{x+2}{2x}<br /> <br />

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  4. #19
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    Quote Originally Posted by Soroban View Post
    Hello, nikk!


    You can get a "prettier" result with \frac{4}{2}: . \frac{4}{2}

    With practice you can create: . \frac{\dfrac{1}{4} - \dfrac{1}{x^2}}{\dfrac{1}{2} - \dfrac{1}{x}} \;=\;\frac{x+2}{2x}<br /> <br />

    it look more prety
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  5. #20
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    Just testing

    \frac{1}{2}mv^2


    20\:\log.\left(\frac{2x10^-1}{2x10^-5}\right)\:=\:80

    10\:\log.\left[\left(\frac{2x10^-1}^2{2x10^-5}^2\right)\right]\:=\:80

    where did i go wrong on equation 3, i have deleted the math tags to show work, i was trying to get the large outside brackets [ ]

    10 log.[(2x10^-1)^2/(2x10^-5)^2]

    also say if i want to show the multiply sign should i use x or *
    Last edited by Paul46; December 2nd 2009 at 10:33 AM. Reason: equation test 3
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  6. #21
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    Quote Originally Posted by Paul46 View Post
    \frac{1}{2}mv^2


    20\:\log.\left(\frac{2x10^-1}{2x10^-5}\right)\:=\:80

    10\:\log.\left[\left(\frac{2x10^-1}^2{2x10^-5}^2\right)\right]\:=\:80

    where did i go wrong on equation 3, i have deleted the math tags to show work, i was trying to get the large outside brackets [ ]

    10 log.[(2x10^-1)^2/(2x10^-5)^2]

    also say if i want to show the multiply sign should i use x or *
    Either 10\:\log.\left[\left(\frac{2\times 10^{-1}}{2\times 10^{-5}}\right)^2\right]\:=\:80, giving 10\:\log.\left[\left(\frac{2\times 10^{-1}}{2\times 10^{-5}}\right)^2\right]\:=\:80,

    or 10\:\log.\left[\left(\frac{(2\times 10^{-1})^2}{(2\times 10^{-5})^2}\right)\right]\:=\:80, giving 10\:\log.\left[\left(\frac{(2\times 10^{-1})^2}{(2\times 10^{-5})^2}\right)\right]\:=\:80,

    will work. But you can't use braces { } to do the same job as parentheses ( ). They have completely different functions in TeX.

    For the multiplication sign, use \times.

    Notice also that if an exponent consists of more than one symbol then you need to enclose the symbols in braces. Otherwise only the first symbol will be superscripted. For example, 10^-1 gives 10^-1, but 10^{-1} gives 10^{-1}.
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  7. #22
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    Thanks very very much! that is a massive help.
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  8. #23
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    I'll try this again:

    I hope i get it right!

    10\:log.\left[\left(\frac{2\times10^{-1}}{2\times10^{-5}}\right)^3\right]\:=\:30\:log.\left(\frac{2\times10^{-1}}{2\times10^{-5}}\right)\:=\:80
    \:=\:80
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  9. #24
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    Why did the last part mess up with the \: & 80??
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  10. #25
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    Just testing

    I'll try again:

    I hope i get better this time?!

    10\:log.\:\left[\left(\frac{(2\times 10^{-1})^3}{2\times10^{-5})^3}\right)\right]\:=\:30\:log.\left(\frac{2\times10^{-1}){2\times10^{-5})\right)\:=120
    Last edited by Paul46; December 4th 2009 at 10:55 AM.
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  11. #26
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    Quote Originally Posted by Paul46 View Post
    Why did the last part mess up with the \: & 80??
    Probably because what you wrote was "[tex]10\:log.\left[\left(\frac{2\times10^{-1}}{2\times10^{-5}}\right)^3\right]\:=\:30\:log.\left(\frac{2\times10^{-1}}{2\times10^{-5}}\right)\:=\:80[/tex]\:=\:80", with an additional "\:=\:80" at the end.

    While I'm about it, here are a couple of extra comments. You don't normally put a full stop after "log", and in TeX you should write "\log". The backslash converts the letters from italic to roman, which looks better (the same applies to other common functions: \cos, \sin, \exp, ...).

    Also, you shouldn't normally need to put extra space in math expressions by inserting spaces like "\:". TeX is designed to incorporate good spacing automatically.
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  12. #27
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    so where did i go wrong with the above? i have removed math tags.
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  13. #28
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    This forum is really high, i'm glad Jameson took me over to here i'm learning so much!
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  14. #29
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    \frac{1}{16}
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  15. #30
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    Quote Originally Posted by xavier9977 View Post
    \frac{1}{16}
    squr{x^{3}}
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