Does the equality $1+2+3+.... = -\frac{1}{12}$ lead to a contradiction?
4340
Why does $1+2+3+\cdots = -\frac{1}{12}$?
141886
Incorrect notation in math?
50599
Prove that $\frac{1}{1*3}+\frac{1}{3*5}+\frac{1}{5*7}+...+\frac{1}{(2n-1)(2n+1)}=\frac{n}{2n+1}$
107390
Why is (-1)(-1) = 1?
17963
I have learned that 1/0 is infinity, why isn't it minus infinity?
134535
Inequality $\frac{a}{b} + \frac{b}{c} + \frac{c}{a} \geq a + b+ c$ when $abc = 1$
53123
Trying to derive a contradiction with this simple inequality,
29739
How can $\frac{x^3-4x^2+4x}{x^2-4}$ be both $0$ and "undefined" when $x = 2$?
118517
Does this constitute a valid proof that $\frac{x^2}{1+x^4} \leq \frac{1}{2}$?
146169
Integer solutions to $\frac{1}{a} + \frac{1}{b} = \frac{1}{12}$.
140086
Does $3-4+1$ equal $0$ or $-2$.. or maybe $2$?
89728
Prove that $1<\frac{1}{n+1}+\frac{1}{n+2}+...+\frac{1}{3n+1}$
93756
$1+\frac{1}{2} +\frac{1}{3} +...+\frac{1}{p-1} =\frac{a}{b}$
73253
Question About equal signs in Theorems
111805
If $a_{1}=1$ and $a_{n+1}=1+\frac{n}{a_{n}}$, then $a_{n}=\sqrt{n}+\frac{1}{2}-\frac{1}{8\sqrt{n}}+o\left(\frac{1}{\sqrt{n}}\right)$
35242
If $a$, $b$, $c$, $\frac{a}{b}+\frac{b}{c}+\frac{c}{a}$, and $\frac{a}{c}+\frac{b}{a}+\frac{c}{b}$ are all integers, then $|a|=|b|=|c|$
80004
Why is $1/i$ equal to $-i$?