Question

new one

Answer 1

\[[\large \log \sqrt{x^2+y^2}]' = \dfrac{1}{\sqrt {x^2+y^2}} \times \dfrac{d}{dx}(\sqrt{x^2+y^2}) \\ \large = \dfrac{1}{\sqrt {x^2+y^2}} \times \dfrac{1}{2 \sqrt{x^2+y^2}}\dfrac{d}{dx}(x^2+y^2)=....\]
[\large \log \sqrt{x^2+y^2}]' = \dfrac{1}{\sqrt {x^2+y^2}} \times \dfrac{d}{dx}(\sqrt{x^2+y^2}) \\ \large = \dfrac{1}{\sqrt {x^2+y^2}} \times \dfrac{1}{2 \sqrt{x^2+y^2}}\dfrac{d}{dx}(x^2+y^2)=....

Answer 2

\[[\large \log \sqrt{x^2+y^2}]' = \frac{1}{\sqrt {x^2+y^2}} \times \frac{d}{dx}(\sqrt{x^2+y^2}) \\ \large = \frac{1}{\sqrt {x^2+y^2}} \times \frac{1}{2 \sqrt{x^2+y^2}}\frac{d}{dx}(x^2+y^2)=....\]
[\large \log \sqrt{x^2+y^2}]' = \frac{1}{\sqrt {x^2+y^2}} \times \frac{d}{dx}(\sqrt{x^2+y^2}) \\ \large = \frac{1}{\sqrt {x^2+y^2}} \times \frac{1}{2 \sqrt{x^2+y^2}}\frac{d}{dx}(x^2+y^2)=....

Answer 3

same syntax ? no...
the first one is \dfrac
and 2nd is just \frac

\(\dfrac{test}{this }\)
`\(\dfrac{test}{this }\)`
compared to
\(\frac{test}{this }\)
`\(\frac{test}{this }\)`

Answer 4

i can see the first one having bold line

Answer 5

Stange,, the first one is bold here, the second one not
while 1 minute ago it was first normal second bold 0.o

Answer 6

\[\dfrac{dummyme}{dontknowhowtodo}\]\[\frac{needtimetopractice}{nodumbanymore}\]

Answer 7

zoom in your page to see the difference

Answer 8

yup, different . thanks

Answer 9

thank you.

Answer 10

@thomaster after a long time of writing, nothing pops up, why?

Answer 11

I was trying if I could make a bold division bar with normal numerator and denominator :P

Answer 12

\[\huge\dfrac{\frac{aaaaaaa}{bbbbbbbbb}}{\frac{ccccccccccccccc}{ddddddddddddd}}\]
hihihihi.... quite clear, right/

Answer 13

you can make the middle division bar longer by adding some spaces

\(\huge\dfrac{~\dfrac{a}{b}~}{\dfrac{c}{d}}\)

Answer 14

`\(\huge\dfrac{~\dfrac{a}{b}~}{\dfrac{c}{d}}\)`

Answer 15

1~ just a little bit longer, what if I want to make it loooooonger?

Answer 16

\(\huge\dfrac{~~~~~~~\dfrac{a}{b}~~~~~~~}{\dfrac{c}{d}}\)

Answer 17

\(He \quad hi\)
`\(\dfrac{test}{this }\)`
use \quad for longer spaces

Answer 18

`\(He \quad hi\)`

Answer 19

or
`\hspace{20pt}`

you can make the space as long as you want by changing the 20

Answer 20

\[He\hspace{50pt} hi\]yep, gotit

Answer 21

\[\left[\begin{matrix}a & b \\ c & d\end{matrix}\right] *\left[\begin{matrix}a&b\\c&d\end{matrix}\right]=\left[\begin{matrix}-1&0\\0&-1\end{matrix}\right]\]

Answer 22

I practice, hihi

Answer 23

how to make -/+ in order?

Answer 24

\(\Large \pm\) ??

Answer 25

more symbols: http://omega.albany.edu:8008/Symbols.html

Answer 26

thanks！ It helps, amistre64 's explanation sucks!

Answer 27

I saw someone posted something and had a code at the middle of the text without taking another line, for example: sin\theta = \frac {1}{5}. but I don't know how to do. When I write, it always jumps into the next line.
Show me, please @e.mccormick

Answer 28

Bla bla \(\backslash (\)some latex\) bla bla. That type inline?

Answer 29

e.mccormick is sin\(\theta\) and I got it \(\text {thank you}\)

Answer 30

Kk. Have fun!

Answer 31

you too

Answer 32

and how to make it be bold

Answer 33

This is where \tfrac{}{} and \dfrac{}{} can also help. \tfrac{}{}, Text Fraction, means to make it small, like inline text, no matter what. \dfrac{}{}, Display fraction, means make it large, like it was a stand alone equation, no matter what.

This line is with \(\frac{1}{2}\) just \frac{}{}
This line is with \(\tfrac{1}{2}\) just \tfrac{}{}
This line is with \(\dfrac{1}{2}\) just \dfrac{}{}

This block is with \[\frac{1}{2}\] just \frac{}{}
This block is with \[\tfrac{1}{2}\] just \tfrac{}{}
This block is with \[\dfrac{1}{2}\] just \dfrac{}{}

Notice that the frac changes if it is inline or in a block, \(\backslash\)[ BLOCK \]. But the dfrac and tfrac do not.

Answer 34

Fonts use \mathbb{text}, \mathbf{text}, \mathit{text}, and so on.
http://www.codecogs.com/eqneditor shows them all at the top.

Answer 35

let me practice \(\tfrac{you}{me}\) and \(\dfrac{you}{me}\) how about \(\frac {you}{me}\)

Answer 36

the first and the last are the same, right?

Answer 37

The math fonts are for equations, but same ones are there for text. here is why:

\textbf{Some text with spaces}
\(\textbf{Some text with spaces}\)

\mathbf{Some text with spaces}
\(\mathbf{Some text with spaces}\)

See the spaces and what happens to them in math mode?

Answer 38

I can see the difference. b stands for bold?

Answer 39

Yes, the first and last are the same. Where the [d|t]frac comes in really handy is when you need to make sure one is a large fraction inside another fraction. Or small, and so on. Large inline with text, so it is clear...

Answer 40

BoldFace ITalics BlackBoard RoMan TextwriTer

Answer 41

Not all of them are supported, like \textsc fails with MathJax.... SmallCaps.

Answer 42

\(\textbf{get nothing, hehe}\) \(\text{now, get a lot, hihi}\)

Answer 43

The link is an editor interface.

Answer 44

With the t/d fracs you can do \(\dfrac{d}{dx}\left( \dfrac{\dfrac{\tfrac{\pi}{4}+e^x}{x^e}}{14x^6+12x^3-7i}\right )\) inline and it is still readable.

Answer 45

what are you guys talking about, I cannot understand a word!

Answer 46

@caozeyuan We are talking about \(\LaTeX\).

@Loser66 Attached is what I was saying about the safety bar was attached wrong.

Answer 47

@e.mccormick so how can I use it in everyday life e.g. when writing an email or a doc. ?

Answer 48

\(\LaTeX\) has many editors, which make it great for writing papers, books, and so on. Especially ones with formulas and graphs. In fact, I linked one in another post recently.

Answer 49

Tag me Please! I want to get that! is it for free?

Answer 50

Near the bottom of this is a PDF with vectors, all done in \(\LaTeX\)

http://openstudy.com/study#/updates/51ed5575e4b00daf471999bb

And here is a bit on using the codes to do posts here.
http://openstudy.com/study#/updates/51d89020e4b041c5c27459bb

The same MathJax plugin can be added to blogs and other sites to do similar things elsewhere.

Answer 51

Yes. \(\LaTeX\) is free. For doing papers, I use MiKTeX on Windows as my TeX rendering engine and TeXmaker as my editor. However, to just try it for free you can use one of the online ones.
https://www.writelatex.com/
http://www.codecogs.com/latex/eqneditor.php (Equations only, but makes them into grapics!)
http://www.scribtex.com/
https://www.sharelatex.com/