Sep 27, 2013 · The title says it all, both \dfrac {a} {b} and \frac {a} {b} make fractions, so what is the difference between the two?

The command \over is a so-called "primitive" command that's available in Plain TeX and in LaTeX. \frac is a LaTeX-only command that builds on the \over macro to provide something that's much less likely …

I am wondering how to make a fraction in LaTeX small enough to fit on a line, or at least just a little larger. I could have sworn I had seen this before but I just cannot find it. In particular, I

Should one use \frac or /? If you think that / should be used, at what point is the fraction "large enough" that one should switch to using \frac? Fractions in subscript and superscript (e.g. exponents). …

\[ \frac{\fam0 a}{b} \] For my purposes, should such an issue arise, it is easily resolved by using \frac and so, while this example illustrates a shortcoming of \over and the need for something more robust, it …

With amsmath or mathtools you can write dfrac instead of frac, but since dfrac is used for inline fractions, it won't change anything for you in math environments. My workaround is using …

Jul 11, 2023 · How do you arrive at $1+\cos^2x = 2\cos^2\left (\frac {x} {2}\right)$ in your second line? That incorrect identity completely invalidates the rest of your work. You don't have to delete your …

Apr 11, 2013 · I was wondering if it is possible to get a link to a rigorous proof that $$\displaystyle \lim_ {n\to\infty} \left (1+\frac {x} {n}\right)^n=\exp x$$

It is nearly always best to use the slashed form for fractions in the text:

In my AI textbook there is this paragraph, without any explanation. The sigmoid function is defined as follows $$\\sigma (x) = \\frac{1}{1+e^{-x}}.$$ This function is easy to differentiate