Diffentiating a function f with respect to x
10555
Differentiating two tables x and y?
74810
A function $f$ such that $f' = 0$ when $x < 0$ and $f' = 1$ when $x \geq 0$?
156536
Defining functions as derivatives
44293
Functions satisfying $f\left( f(x)^2+f(y) \right)=xf(x)+y$
66406
How to calculate $f(x)$ in $f(f(x)) = e^x$?
105319
A calculus problem with functions such that $f''(x) = g(x)$ and $g''(x) = f(x)$
82001
How to prove the function is a constant
68774
Proving that $f(x)$ is less than or equal to $1+\pi/4$
56127
Prove a function is constant under certain conditions
64339
Find $f$ where $f'(x) = f(1+x)$
48275
$f$ defined $|f(x) - f(y)| \leq |x - y|^{1+ \alpha}$ Prove that $f$ is a constant.
106284
Establishing a Basis for $F[x]/(f(x))$
111756
How do I prove that then $f(x) = 1$ for some $x ∈ [0, 1]$?
64836
Functions that are always less than their derivatives
9270
Differentiable function, with $f'(x)=[f(x)]^2$
57938
When do two functions become equal?
151947
Finding a pair of functions with properties