# Thread: just testing

1. Originally Posted by Soroban
Captions?

. . ]
Hahahahahahaha, I am sorry. That was very clever.

2. ## my first latect testing

$

1+1 = 4/2

$

--------------------------
$

1+2 = 3

$

3. 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}

$

4. Originally Posted by Soroban
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}

$

it look more prety

5. ## 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 *

6. Originally Posted by Paul46
$\frac{1}{2}mv^2$

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

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 $10^{-1}$.

7. Thanks very very much! that is a massive help.

8. 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

9. Why did the last part mess up with the \: & 80??

10. ## 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

11. Originally Posted by Paul46
Why did the last part mess up with the \: & 80??
Probably because what you wrote was "$$10\:log.\left[\left(\frac{2\times10^{-1}}{2\times10^{-5}}\right)^3\right]\:=\:30\:log.\left(\frac{2\times10^{-1}}{2\times10^{-5}}\right)\:=\:80$$\:=\:80", 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.

12. so where did i go wrong with the above? i have removed math tags.

13. This forum is really high, i'm glad Jameson took me over to here i'm learning so much!

14. $\frac{1}{16}$

15. Originally Posted by xavier9977
$\frac{1}{16}$
$squr{x^{3}}$

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