Question

Is this a valid proof of the parallel postulate?

score 91 · Answer 1 · 2026-03-29 13:39:17

91

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Is this a valid proof of the parallel postulate?

Published on 29 Mar 2026 - 13:39

score 65 · Answer 2 · 2019-05-19 18:40:40

65

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Let $z_1,z_2,z_3 \in \mathbb{C}$ with $z_i=1$ for $i=1,2,3$ and $z_1+z_2+z_3$. Show that $z_i$ are vertices for a equilateral triangle.

Published on 19 May 2019 - 18:40

score 69 · Answer 3 · 2019-05-19 19:44:24

69

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System of first order linear differential equations

Published on 19 May 2019 - 19:44

score 3.9k · Answer 4 · 2019-05-20 08:13:31

3.9k

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Degrees of freedom in an equation

Published on 20 May 2019 - 8:13

score 295 · Answer 5 · 2026-03-25 01:34:50

295

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What is meant by tridiagonal linear equation system?

Published on 25 Mar 2026 - 1:34

score 1.5k · Answer 6 · 2026-03-30 01:47:59

1.5k

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Find the values of a and b that make the equation system have infinite solutions

Published on 30 Mar 2026 - 1:47

score 48 · Answer 7 · 2026-03-27 03:41:36

48

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solving set a set of in-equations for x and y

Published on 27 Mar 2026 - 3:41

score 64 · Answer 8 · 2026-03-27 13:35:59

64

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Solve the following system of equations - (6).

Published on 27 Mar 2026 - 13:35

score 136 · Answer 9 · 2026-04-03 04:16:29

136

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Irreducible polynomials for that each output is divisible by an integer n

Published on 03 Apr 2026 - 4:16

score 91 · Answer 10 · 2026-03-28 10:04:29

91

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Solving $\frac{\alpha^2}{(t_1-x)^2}+\frac{\beta^2}{(t_2-x)^2}=1$

Published on 28 Mar 2026 - 10:04

score 1.1k · Answer 11 · 2026-03-30 13:20:12

1.1k

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Knowing that a feasible solution exists and has a finite optimal solution

Published on 30 Mar 2026 - 13:20

score 78 · Answer 12 · 2026-03-29 16:49:46

78

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Solution of a nonlinear system of equations with 3 unknowns

Published on 29 Mar 2026 - 16:49

score 86 · Answer 13 · 2019-05-24 00:15:21

86

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What should be the value(s) of $k$, for which the pair of linear equations $kx+y=k^2$ and $x+ky=0$ have infinitely many solutions

Published on 24 May 2019 - 0:15

score 53 · Answer 14 · 2019-05-24 04:06:32

53

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Find the solutions of the system of equations $a+b= c^n$;$b+c=a^n$;$c+a= b^n $,$\forall a,b,c \in \mathbb R$ and $n \in \mathbb Z^+$

Published on 24 May 2019 - 4:06

score 151 · Answer 15 · 2026-03-25 04:57:19

151

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How to solve this 4x4 equation system for a cubic spline?

Published on 25 Mar 2026 - 4:57

List Question

Is this a valid proof of the parallel postulate?

Let $z_1,z_2,z_3 \in \mathbb{C}$ with $z_i=1$ for $i=1,2,3$ and $z_1+z_2+z_3$. Show that $z_i$ are vertices for a equilateral triangle.

System of first order linear differential equations

Degrees of freedom in an equation

What is meant by tridiagonal linear equation system?

Find the values of a and b that make the equation system have infinite solutions

solving set a set of in-equations for x and y

Solve the following system of equations - (6).

Irreducible polynomials for that each output is divisible by an integer n

Solving $\frac{\alpha^2}{(t_1-x)^2}+\frac{\beta^2}{(t_2-x)^2}=1$

Knowing that a feasible solution exists and has a finite optimal solution

Solution of a nonlinear system of equations with 3 unknowns

What should be the value(s) of $k$, for which the pair of linear equations $kx+y=k^2$ and $x+ky=0$ have infinitely many solutions

Find the solutions of the system of equations $a+b= c^n$;$b+c=a^n$;$c+a= b^n $,$\forall a,b,c \in \mathbb R$ and $n \in \mathbb Z^+$

How to solve this 4x4 equation system for a cubic spline?

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