Question

continuous function with zero right-derivative implies it is constant

score 47 · Answer 1 · 2026-04-17 01:15:10

47

Views

continuous function with zero right-derivative implies it is constant

Published on 17 Apr 2026 - 1:15

score 67 · Answer 2 · 2026-04-13 13:46:21

67

Views

Homeomorphism in a normed space

Published on 13 Apr 2026 - 13:46

score 52 · Answer 3 · 2026-04-15 16:14:44

52

Views

$ f\left(x^{2}+1\right)=f(x) g(x) $ for every $x \in \mathbb{R},$ then

Published on 15 Apr 2026 - 16:14

score 287 · Answer 4 · 2026-04-16 02:56:15

287

Views

Let $A$ & $B$ be sets. Prove that $\{A,B\}$ is a set.

Published on 16 Apr 2026 - 2:56

score 216 · Answer 5 · 2026-04-14 05:37:54

216

Views

Rational points of an circle centred at $(\pi,2)$

Published on 14 Apr 2026 - 5:37

score 161 · Answer 6 · 2026-03-26 02:56:17

161

Views

Study of the function $f(x)=x^{\frac{1}{x}}$ with $x\geq 1$ without derivative and using of Lambert's function

Published on 26 Mar 2026 - 2:56

score 31 · Answer 7 · 2026-04-14 13:35:52

31

Views

$f(t)$ $T-$periodic and differentiable veryfiyng that $f(t)\geq 0 \implies f'(t)$ has constant sign, then $f(t)$ has constant sign.

Published on 14 Apr 2026 - 13:35

score 48 · Answer 8 · 2026-04-15 13:44:17

48

Views

Is it possible to find a $2 × 2$ matrix $M$ for which the equation $M\vec{x} = \vec{p}$ has the following properties?

Published on 15 Apr 2026 - 13:44

score 480 · Answer 9 · 2026-04-12 14:11:36

480

Views

Vic can beat Harold by $1/10$ of a mile in a $2$ mile race. Harold can beat Charlie by $1/5$ of a mile in a $2$ mile race. Very Confused.

Published on 12 Apr 2026 - 14:11

score 35 · Answer 10 · 2026-04-16 11:06:02

35

Views

Finding points $X=(x,y)$ and directions where directional derivative of $f(x,y)=3x^2+y^2$ is maximum. The points are to be taken on $x^2+y^2=1$

Published on 16 Apr 2026 - 11:06

score 43 · Answer 11 · 2026-04-08 18:03:22

43

Views

In doubt with Cauchy-Schwarz inequality for complex numbers

Published on 08 Apr 2026 - 18:03

score 894 · Answer 12 · 2026-04-16 05:21:06

894

Views

If a divides $b-1$ and a divides $c-1$ then a divides $bc-1$

Published on 16 Apr 2026 - 5:21

score 162 · Answer 13 · 2026-04-13 22:52:42

162

Views

Show that the orbits are given by ellipses $\omega^{2}x^{2}+v^{2}=C$, where $C$ is any non- negative constant.

Published on 13 Apr 2026 - 22:52

score 461 · Answer 14 · 2026-04-12 08:33:19

461

Views

Proof completion: Exercise 24(d) Chapter 3 in Baby Rudin

Published on 12 Apr 2026 - 8:33

score 87 · Answer 15 · 2026-04-24 18:55:04

87

Views

Is this proof correct for congruences?

Published on 24 Apr 2026 - 18:55

List Question

continuous function with zero right-derivative implies it is constant

Homeomorphism in a normed space

$ f\left(x^{2}+1\right)=f(x) g(x) $ for every $x \in \mathbb{R},$ then

Let $A$ & $B$ be sets. Prove that $\{A,B\}$ is a set.

Rational points of an circle centred at $(\pi,2)$

Study of the function $f(x)=x^{\frac{1}{x}}$ with $x\geq 1$ without derivative and using of Lambert's function

$f(t)$ $T-$periodic and differentiable veryfiyng that $f(t)\geq 0 \implies f'(t)$ has constant sign, then $f(t)$ has constant sign.

Is it possible to find a $2 × 2$ matrix $M$ for which the equation $M\vec{x} = \vec{p}$ has the following properties?

Vic can beat Harold by $1/10$ of a mile in a $2$ mile race. Harold can beat Charlie by $1/5$ of a mile in a $2$ mile race. Very Confused.

Finding points $X=(x,y)$ and directions where directional derivative of $f(x,y)=3x^2+y^2$ is maximum. The points are to be taken on $x^2+y^2=1$

In doubt with Cauchy-Schwarz inequality for complex numbers

If a divides $b-1$ and a divides $c-1$ then a divides $bc-1$

Show that the orbits are given by ellipses $\omega^{2}x^{2}+v^{2}=C$, where $C$ is any non- negative constant.

Proof completion: Exercise 24(d) Chapter 3 in Baby Rudin

Is this proof correct for congruences?

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