Is $f(x) = 1$ equal to $f(x) = \frac{x}{x}$?
6482
Why aren't the functions $f(x) = \frac{x-1}{x-1}$ and $f(x) = 1$ the same?
55175
Is the function $f(x) = x^2 - 2x$ one-to-one?
132093
Solve $f(f(x))=f(x)$
158420
Is $\frac00=\infty$? And what is $\frac10$? Are they same? Does it hold true for any constant $a$ in $\frac{a}0$
132113
Does $f(x) = f(2x)$ for all real $x$, imply that $f(x)$ is a constant function?
82597
How to find $ f(x)$ if $f(1-f(x))=x$ for all $x$ $\in \mathbb{R}$
32575
What's the name for the property of a function $f$ that means $f(f(x))=x$?
17707
Why is ${x^{\frac{1}{2}}}$ the same as $\sqrt x $?
1626
How do we prove $\int_I\int_x^1\frac{1}{t}f(t)\text{ dt}\text{ dx}=\int_If(x)\text{ dx}$
98271
Why does $(x \to a) ≠ (x = a)$ , But $f(x \to a) = f(x = a)$
68743
If $\frac{1}{a}+\frac{1}{b}+\frac{1}{c}=\frac{1}{a+b+c}$ then $\frac{1}{a^5}+\frac{1}{b^5}+\frac{1}{c^5}=\frac{1}{a^5+b^5+c^5}.$
149201
What does $\lim_{x\to4} \frac{1}{x-4}$ equal?
152841
I want to show that $f(x)=x.f(1)$ where $f:R\to R$ is additive.
33247
Does $f(0)=0$ and $\left|f^\prime(x)\right|\leq\left|f(x)\right|$ imply $f(x)=0$?
44630
Is $\frac{1}{\sqrt{2}}$ a fraction or not?
134835
What is exactly the inverse of the function $f(x)=\frac{x}{1-x^2}$?
63750
let $f(\frac{x}{3})+f(\frac{2}{x})=\frac{4}{x^2}+\frac{x^2}{9}-2$ then find $f(x)$