$\frac{63^{1-n}}{4^{n+2} \cdot 7^{n-1}} \cdot 36^{-n-1} \cdot 81^{-1}$

Sep 27, 2013the title says it all, both \dfrac {a} {b} and \frac {a} {b} make fractions, so what is the difference between the two? It is nearly always best to use the slashed form for fractions in the text: Dec 8, 2016often it looks better to use \tfrac if you are just wanting a numeric fraction as part of an expression, when the display fraction can look a bit spacey.

Conversely if the fraction is. ${ \frac{\fam0 a}{b} }$ 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. $8 \int_0^ {\infty} du \frac { (u^2-1) (u^4-6 u^2+1)} {u^8+4 u^6+70 u^4+4 u^2+1} \log.

Sep 12, 2018this runs fine without any errors but i would like to use the regular \frac function because it is neater for the particular problem. 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. Your question is basically about mathjax usage in websites (such as math.se), but fortunately, \frac or \dfrac command (for 'better' fractions) work with mathjax

Oct 30, 2010888 as i have heard people did not trust euler when he first discovered the formula (solution of the basel problem) $\zeta (2)=\sum_ {k=1}^\infty \frac {1} {k^2}=\frac {\pi^2} {6}$.