How to prove that this is a rational function?
75694
The Schwarz Reflection Principle for a circle
19019
Find all functions $f:\Bbb{Q}\rightarrow \Bbb{Q}$ such that $f(x)+f(t)=f(y)+f(z)$ for all rational numbers $x<y<z<t$ that form an AP
126074
Proof of the irrationality of $\sqrt{3}$ - logic question
86497
Prove that any rational can be expressed in the form $\sum\limits_{k=1}^n{\frac{1}{a_k}}$, $a_k\in\mathbb N^*$
158888
Prove that the function $f(x)=\frac{x}{x^2+1}$ is continuous at $x=-1$.
55302
Rational values of trigonometric functions
30478
How to prove that a number is irrational
153043
Show that $\sqrt{4+2\sqrt{3}}-\sqrt{3}$ is rational using the rational zeros theorem
58284
How to prove that $\sqrt[3] 2 + \sqrt[3] 4$ is irrational?
107089
finding rational roots of polynomials
111094
Help with proving that $\pi$ is irrational
37529
If $\sqrt[3]{a} + \sqrt[3]{b}$ is rational then prove $\sqrt[3]{a}$ and $\sqrt[3]{b}$ are rational
11069
Deciding whether $2^{\sqrt2}$ is irrational/transcendental
27775
Proving a function is not a contraction
134439
Proving function is $C^k$
145573
How to show that $f$ is a zero function?
60348
How do I prove $F(a)=F(a^2)?$