Why do we need to rationalize fractions?
50905
Why rationalize the denominator?
42306
Motivation for Napier's Logarithms
55095
Why can't we separate fraction powers in euler's formula?
71726
When can we not treat differentials as fractions? And when is it perfectly OK?
53661
Intuition surrounding units in $R[x]$
38719
In this case, why must $p$ divide $|G/N|$?
41645
Checking my understanding: $1 - 1 + 1 - 1 + 1 - ... = \frac{1}{2}$
106242
Why no common factors in proving root 2 is irrational?
19561
Why is $\frac{1}{\frac{1}{X}}=X$?
137030
Why are there more Irrationals than Rationals given the density of $Q$ in $R$?
4340
Why does $1+2+3+\cdots = -\frac{1}{12}$?
40415
Why do we require quotient to be surjective?
146616
Why is the squared difference so commonly used?
12010
Integration by partial fractions; how and why does it work?
120430
A question about how to express a fraction as ${1\over q_1}+{1\over q_2}+ \cdots+{1\over q_N}$
151582
Why is it rational to pay out a dividend?
33786
Proof that a certain fraction is always an integer