User InfZero

4 votes

1 answer

3k views

What does mean weaker and stronger terms in logic?

asked Aug 6, 2016 at 17:41

4 votes

1 answer

24k views

What shapes are described with $\rho = \cos{(\phi)}$ and $\rho = \cos{(2\theta)}$?

asked Aug 7, 2016 at 21:03

3 votes

1 answer

496 views

Is the vector $(2,2)$ perpendicular to the level curve 2 of $f(x,y)=4-x^{2}-y^{2}$?

asked Sep 14, 2016 at 19:28

3 votes

1 answer

84 views

Prove that $S(2,\mathbb{R})$ is a vector subspace of size $2\times2$

asked Nov 18, 2015 at 13:15

3 votes

5 answers

2k views

How to write a definition of less than $<$?

asked Jan 19, 2016 at 17:06

3 votes

1 answer

962 views

What the gray area in the plane $x + y + z = 1$ means?

asked Feb 4, 2016 at 16:24

3 votes

1 answer

301 views

Probing that $\sin^2{\phi}+\cos^2{\phi}=1$ for cross and dot product

asked Feb 9, 2016 at 17:13

2 votes

1 answer

2k views

Distance between two symmetric equations

asked Feb 11, 2016 at 14:02

2 votes

2 answers

49 views

How to find a trajectory $\sigma(t)$ to represent the ellipse $\{(x,y):4x^{2}+9y^{2}=36\}$?

asked Sep 11, 2016 at 15:46

2 votes

2 answers

3k views

Prove that if $A$ is a square matrix, then $(A^{n})^{T}=(A^{T})^{n}$

asked Feb 4, 2016 at 15:31

2 votes

1 answer

1k views

How to find the volume of region described by three equations?

asked Sep 30, 2016 at 23:32

2 votes

3 answers

15k views

How to plot $x^{2}=y^{2}-z^{2}$?

asked Aug 11, 2016 at 19:39

2 votes

2 answers

268 views

Graph $y = x^2$ in space

asked Aug 12, 2016 at 15:28

2 votes

0 answers

42 views

Graph of $x=1$ in space

asked Aug 12, 2016 at 22:16

2 votes

2 answers

18k views

Find an equation for the surface with all points which are equidistant of $(-1,0,0)$ and the plane $x=1$

asked Aug 12, 2016 at 22:47

2 votes

5 answers

3k views

How to change the limits of a double integral to polar coordinates limits?

asked Oct 8, 2016 at 20:46

2 votes

0 answers

360 views

How to find the surface area of unit cube using a surface integral?

asked Oct 27, 2016 at 22:42

2 votes

2 answers

355 views

How to change the order of integration when angles and trigonometric functions are involved in limits?

asked Nov 2, 2016 at 23:08

1 vote

2 answers

90 views

How to show that $\iint_{S}\vec{F}\cdot d\vec{S}=0$ with the vector field $\vec{F}=\big\langle0,0,z\big\rangle$?

asked Nov 26, 2016 at 15:55

1 vote

1 answer

3k views

How to calculate the volume of a solid bounded by the surface $z=\sin y$, the planes $x=1$, $x=0$, $y=0$ and $y=\pi/2$ and the plane $xy$

asked Oct 22, 2016 at 0:42

1 vote

0 answers

61 views

Rewriting a limit with $\frac{\sin(3 x - \pi)}{\pi - 3 x}$ to resemble $\lim_{x\to k}\frac{\sin(x)}{x}=1$

asked Apr 16, 2023 at 18:52

1 vote

3 answers

971 views

How to compute the $\lim_{(x,y)\to(0,0)}\frac{x^{2}}{x^{2}+y^{2}}$?

asked Aug 13, 2016 at 1:52

1 vote

2 answers

93 views

How to specify the limit of a piecewise function when a point for continuity is given?

asked Aug 14, 2016 at 22:47

1 vote

2 answers

102 views

How to find the resultant derivative when I know the outputs of $f_{x}$ and $f_{y}$?

asked Aug 21, 2016 at 16:08

1 vote

1 answer

208 views

Describe all orthogonal unit vectors to $-5i-9j-4k$, $7i+8j+9k$, $\vec{0}$

asked Aug 3, 2016 at 18:45

1 vote

2 answers

127 views

Project the vector $\vec{v}$ on the line ${x=3t,y=t,z=2t}$

asked May 13, 2016 at 13:24

1 vote

0 answers

50 views

Find doble integral $\int\int_{D}f(x,y)dA$ with the region $D=\{(x,y)\in \mathbb{R^{2}}:-2\leqslant y\leqslant 3; y^{2}+1\leqslant x\leqslant y+5\}$

asked Sep 27, 2016 at 1:27

1 vote

0 answers

14 views

Write a program for $\{Q: x= A \wedge y=B\}\ ord2\ \{R: x\leqslant y \wedge [(x=A\wedge y=B)\vee(x=B \wedge y=A)]\}$ specification

asked Sep 26, 2016 at 19:07

1 vote

1 answer

65 views

Is this $(2n)!\approx (2\pi (2n))^{1/2}((2n)/e)^{2n}$ valid?

asked Sep 4, 2016 at 17:24

1 vote

4 answers

281 views

How to find an equation for the vector field $\vec{F}=-x\hat{i}+y\hat{j}$?

asked Sep 7, 2016 at 21:11

Stack Exchange Network

83 Questions

What does mean weaker and stronger terms in logic?

What shapes are described with $\rho = \cos{(\phi)}$ and $\rho = \cos{(2\theta)}$?

Is the vector $(2,2)$ perpendicular to the level curve 2 of $f(x,y)=4-x^{2}-y^{2}$?

Prove that $S(2,\mathbb{R})$ is a vector subspace of size $2\times2$

How to write a definition of less than $<$?

What the gray area in the plane $x + y + z = 1$ means?

Probing that $\sin^2{\phi}+\cos^2{\phi}=1$ for cross and dot product

Distance between two symmetric equations

How to find a trajectory $\sigma(t)$ to represent the ellipse $\{(x,y):4x^{2}+9y^{2}=36\}$?

Prove that if $A$ is a square matrix, then $(A^{n})^{T}=(A^{T})^{n}$

How to find the volume of region described by three equations?

How to plot $x^{2}=y^{2}-z^{2}$?

Graph $y = x^2$ in space

Graph of $x=1$ in space

Find an equation for the surface with all points which are equidistant of $(-1,0,0)$ and the plane $x=1$

How to change the limits of a double integral to polar coordinates limits?

How to find the surface area of unit cube using a surface integral?

How to change the order of integration when angles and trigonometric functions are involved in limits?

How to show that $\iint_{S}\vec{F}\cdot d\vec{S}=0$ with the vector field $\vec{F}=\big\langle0,0,z\big\rangle$?

How to calculate the volume of a solid bounded by the surface $z=\sin y$, the planes $x=1$, $x=0$, $y=0$ and $y=\pi/2$ and the plane $xy$

Rewriting a limit with $\frac{\sin(3 x - \pi)}{\pi - 3 x}$ to resemble $\lim_{x\to k}\frac{\sin(x)}{x}=1$

How to compute the $\lim_{(x,y)\to(0,0)}\frac{x^{2}}{x^{2}+y^{2}}$?

How to specify the limit of a piecewise function when a point for continuity is given?

How to find the resultant derivative when I know the outputs of $f_{x}$ and $f_{y}$?

Describe all orthogonal unit vectors to $-5i-9j-4k$, $7i+8j+9k$, $\vec{0}$

Project the vector $\vec{v}$ on the line ${x=3t,y=t,z=2t}$

Find doble integral $\int\int_{D}f(x,y)dA$ with the region $D=\{(x,y)\in \mathbb{R^{2}}:-2\leqslant y\leqslant 3; y^{2}+1\leqslant x\leqslant y+5\}$

Write a program for $\{Q: x= A \wedge y=B\}\ ord2\ \{R: x\leqslant y \wedge [(x=A\wedge y=B)\vee(x=B \wedge y=A)]\}$ specification

Is this $(2n)!\approx (2\pi (2n))^{1/2}((2n)/e)^{2n}$ valid?

How to find an equation for the vector field $\vec{F}=-x\hat{i}+y\hat{j}$?