How can I efficiently type mathematical equations without a computer or laptop?

[nycmathguy]

Homework Statement

Find any intercepts for the given equation.

Relevant Equations

n/a

Find any intercepts for each given equation.

x = y^2 - 5

Let y = 0

x = (0)^2 - 5

x = 0 - 5

x = - 5

The x-intercept is x = -5 and it's found at the point (-5, 0).

Let x = 0

0 = y^2 - 5

5 = y^2

sqrt{5} = sqrt{y^2}

-sqrt{5} = y

sqrt{5} = y

The y-intercepts are y = -sqrt{5} and
y = sqrt{5}. Both are found at the point
(0, -sqrt{5}) and (0, sqrt{5}).

You say?

 

[fresh_42]

It is correct.

It is also standard to write functions as $y=f(x)$ and points as $(x,y)$. You have swapped the roles of $x$ and $y$. This is allowed, but confusing.

If you put ## in front and after every formula then you already have most of the LaTeX code. sqrt{5} should be \sqrt{5} and the sign for plus minus is \pm.

 

[nycmathguy]

It is correct.

It is also standard to write functions as $y=f(x)$ and points as $(x,y)$. You have swapped the roles of $x$ and $y$. This is allowed, but confusing.

If you put ## in front and after every formula then you already have most of the LaTeX code. sqrt{5} should be \sqrt{5} and the sign for plus minus is \pm.

Can you provide a few LaTex examples?

 

[fresh_42]

Examples are here:
https://www.physicsforums.com/help/latexhelp/

I started to learn it by looking at the texts others wrote. If you click on a post with the reply function, e.g.
https://www.physicsforums.com/threads/math-challenge-june-2021.1003663/
then you see all codes which were used. If it doesn't show you the code, then hit the "Toggle BB Code" button in the editor, which is the second to the rightmost, the one with the brackets icon. If you duplicate the tab in your browser, you can even compare them one on one: one tab with the layout and one with the code.
Just make sure you do not hit the post button if you are only looking for examples!

However, your basic needs are simple for now:

Those examples $\frac{2}{3}$ ~ $\frac{2}{3}$ and $\dfrac{1}{4}$ ~ $\dfrac{1}{4}$ are all inline codes, i.e. linear imbedded in the text. Others are:
$3x^2+4x=-5$ ~ $3x^2+4x=-5$
$\pm \sqrt{25}$ ~ $\pm \sqrt{25}$
$\binom{5}{2}= 10$ ~ $\binom{5}{2}= 10$

And if you want to write a certain formula in an extra line, just use $ instead of #. E.g.
$$
e^{i\pi} +1 =0\; \text{~ e^{i\pi} +1 =0}
$$

 

[nycmathguy]

Examples are here:
https://www.physicsforums.com/help/latexhelp/

I started to learn it by looking at the texts others wrote. If you click on a post with the reply function, e.g.
https://www.physicsforums.com/threads/math-challenge-june-2021.1003663/
then you see all codes which were used. If it doesn't show you the code, then hit the "Toggle BB Code" button in the editor, which is the second to the rightmost, the one with the brackets icon. If you duplicate the tab in your browser, you can even compare them one on one: one tab with the layout and one with the code.
Just make sure you do not hit the post button if you are only looking for examples!

However, your basic needs are simple for now:

Those examples $\frac{2}{3}$ ~ $\frac{2}{3}$ and $\dfrac{1}{4}$ ~ $\dfrac{1}{4}$ are all inline codes, i.e. linear imbedded in the text. Others are:
$3x^2+4x=-5$ ~ $3x^2+4x=-5$
$\pm \sqrt{25}$ ~ $\pm \sqrt{25}$
$\binom{5}{2}= 10$ ~ $\binom{5}{2}= 10$

And if you want to write a certain formula in an extra line, just use $ instead of #. E.g.
$$
e^{i\pi} +1 =0\; \text{~ e^{i\pi} +1 =0}
$$

I will work on it.

 

[nycmathguy]

Examples are here:
https://www.physicsforums.com/help/latexhelp/

I started to learn it by looking at the texts others wrote. If you click on a post with the reply function, e.g.
https://www.physicsforums.com/threads/math-challenge-june-2021.1003663/
then you see all codes which were used. If it doesn't show you the code, then hit the "Toggle BB Code" button in the editor, which is the second to the rightmost, the one with the brackets icon. If you duplicate the tab in your browser, you can even compare them one on one: one tab with the layout and one with the code.
Just make sure you do not hit the post button if you are only looking for examples!

However, your basic needs are simple for now:

Those examples $\frac{2}{3}$ ~ $\frac{2}{3}$ and $\dfrac{1}{4}$ ~ $\dfrac{1}{4}$ are all inline codes, i.e. linear imbedded in the text. Others are:
$3x^2+4x=-5$ ~ $3x^2+4x=-5$
$\pm \sqrt{25}$ ~ $\pm \sqrt{25}$
$\binom{5}{2}= 10$ ~ $\binom{5}{2}= 10$

And if you want to write a certain formula in an extra line, just use $ instead of #. E.g.
$$
e^{i\pi} +1 =0\; \text{~ e^{i\pi} +1 =0}
$$

I typically use the MathMagic Lite app.

 

[fresh_42]

I typically use the MathMagic Lite app.

Well, I use TeX quite a lot, here and meanwhile for private use, too. I certainly do not use the full functionality, but some dozen commands. I downloaded AutoHotKey which allows me to define my personal keys. E.g. for
\{\} I hit Alt+N and for {} it's Ctrl+N, for a quotient \dfrac{}{} it's Alt+D. It took a while to learn all alternate keys, but it helps me a lot. I can meanwhile type math as fast as I type ordinary text.

 

[nycmathguy]

Well, I use TeX quite a lot, here and meanwhile for private use, too. I certainly do not use the full functionality, but some dozen commands. I downloaded AutoHotKey which allows me to define my personal keys. E.g. for
\{\} I hit Alt+N and for {} it's Ctrl+N, for a quotient \dfrac{}{} it's Alt+D. It took a while to learn all alternate keys, but it helps me a lot. Meanwhile I can type math as fast as I type ordinary text.

1. I don't have a computer or laptop.

2. I copy and paste most of my questions from downloaded textbooks.

3. For geometric figures, I screen shot a given page in the textbook and then shrink the picture to focus on the question.