List questions from absolute-value | MathQA

The number of disjoint intervals over which the function $f(x) = |0.5x^2−| x | |$ is decreasing is

Published on 12 Apr 2026 - 5:59

How do I prove that $\left|b_n-b\right|<\frac{|b|}{2} $ implies $\left|b_n\right|>\frac{|b|}{2}$

Published on 24 Feb 2026 - 9:53

prove the following statement $|a-b| \le 2\sqrt{a}c + d$ implies $a \le \varepsilon a/(1+\varepsilon) + (1+\varepsilon)c^2/\varepsilon + (b + d)$

Published on 31 Dec 2022 - 15:54

Is this case distinction correct

Published on 12 Jan 2023 - 10:22

$|x - 1| = 1 - x$

Published on 14 Jan 2023 - 17:53

What is the correct syntax for this composite function involving absolute values and root signs?

Published on 15 Jan 2023 - 1:23

How to prove $|x+x_1+...+x_n| \ge |x|-(|x_1|+...+|x_n|)$?

Published on 16 Jan 2023 - 11:53

Questions about equiangular

Published on 09 Apr 2026 - 19:01

At how many isolated points in $\Bbb R^n$ might the distance of a quadratic polynomial $p:\Bbb R^n\to \Bbb R$ from 0 be locally maximized?

Published on 18 Jan 2023 - 2:28

Verify solution to a 2nd order ODE

Published on 23 Jan 2023 - 14:24

How do you show that an absolute value is non-archimedean if $\sup\{|n|: n \text{ is an integer}\}= C<\infty$ and how to show that $C=1$?

Published on 09 Apr 2026 - 8:10