Question

help solving a probability exercise

score 65 · Answer 1 · 2026-04-12 08:07:23

65

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help solving a probability exercise

Published on 12 Apr 2026 - 8:07

score 94 · Answer 2 · 2026-04-16 09:49:35

94

Views

A problem about the connectivity of vertices that must have the same color for any proper minimal $4$-coloring of a graph.

Published on 16 Apr 2026 - 9:49

score 107 · Answer 3 · 2026-04-15 08:05:53

107

Views

Need help in showing that if (a,b) = 1, then (n,ab) = (n,a)(n,b).

Published on 15 Apr 2026 - 8:05

score 91 · Answer 4 · 2026-04-12 10:29:36

91

Views

If I were a child interested on becoming a mathematician, when should I start learning proofs?

Published on 12 Apr 2026 - 10:29

score 37 · Answer 5 · 2026-04-12 08:17:57

37

Views

How to calculate how many "double-downs" can be done given a total balance and a starting bid

Published on 12 Apr 2026 - 8:17

score 64 · Answer 6 · 2026-04-13 19:13:15

64

Views

Calculate statistically needed tries to rech consensus.

Published on 13 Apr 2026 - 19:13

score 934 · Answer 7 · 2026-04-09 16:47:16

934

Views

Conditional Probability Question (Urns and Balls)

Published on 09 Apr 2026 - 16:47

score 64 · Answer 8 · 2026-04-16 07:49:14

64

Views

It is given that $(1+x)(1+{x}^{2})(1+{x}^{3})(1+{x}^{4})......(1+{x}^{100})$ ,Find the coefficient of ${x}^{9}$ in the expansion.

Published on 16 Apr 2026 - 7:49

score 32 · Answer 9 · 2026-04-09 20:36:28

32

Views

Evaluating an integral involving a product of exponential sines

Published on 09 Apr 2026 - 20:36

score 549 · Answer 10 · 2026-04-17 12:42:01

549

Views

What is the smallest positive integer such that 1-2+3-4+5-6+...+(-1)^(n+1)n is more than or equal to 100?

Published on 17 Apr 2026 - 12:42

score 273 · Answer 11 · 2026-04-17 05:59:59

If $\frac1x+\frac1y+\frac1z=0, xyz \neq 0$, $\sqrt[3]{\tiny\frac{x^9+y^9+z^9-3xyz(x^6+y^6+z^6)+6x^3y^3z^3}{x^6+y^6+z^6-3x^2y^2z^2}} =?$

score 593 · Answer 12 · 2026-04-16 20:26:14

593

Views

If $x+y+z=xyz$, prove $\frac{2x}{1-x^2}+\frac{2y}{1-y^2}+\frac{2z}{1-z^2}=\frac{2x}{1-x^2}\times\frac{2y}{1-y^2}\times\frac{2z}{1-z^2}$

Published on 16 Apr 2026 - 20:26

score 82 · Answer 13 · 2026-04-15 03:08:38

82

Views

Find the least number of points plotted on the circle .

Published on 15 Apr 2026 - 3:08

score 379 · Answer 14 · 2026-04-16 06:17:40

379

Views

finding the coefficient of ${t}^{20}$ in the expansion of ${({t}^{3}-3{t}^{2}+7t+1)}^{11}$

Published on 16 Apr 2026 - 6:17

score 117 · Answer 15 · 2026-04-16 13:38:12

117

Views

Write 1000 using three 13s

Published on 16 Apr 2026 - 13:38

List Question

help solving a probability exercise

A problem about the connectivity of vertices that must have the same color for any proper minimal $4$-coloring of a graph.

Need help in showing that if (a,b) = 1, then (n,ab) = (n,a)(n,b).

If I were a child interested on becoming a mathematician, when should I start learning proofs?

How to calculate how many "double-downs" can be done given a total balance and a starting bid

Calculate statistically needed tries to rech consensus.

Conditional Probability Question (Urns and Balls)

It is given that $(1+x)(1+{x}^{2})(1+{x}^{3})(1+{x}^{4})......(1+{x}^{100})$ ,Find the coefficient of ${x}^{9}$ in the expansion.

Evaluating an integral involving a product of exponential sines

What is the smallest positive integer such that 1-2+3-4+5-6+...+(-1)^(n+1)n is more than or equal to 100?

If $\frac1x+\frac1y+\frac1z=0, xyz \neq 0$, $\sqrt[3]{\tiny\frac{x^9+y^9+z^9-3xyz(x^6+y^6+z^6)+6x^3y^3z^3}{x^6+y^6+z^6-3x^2y^2z^2}} =?$

If $x+y+z=xyz$, prove $\frac{2x}{1-x^2}+\frac{2y}{1-y^2}+\frac{2z}{1-z^2}=\frac{2x}{1-x^2}\times\frac{2y}{1-y^2}\times\frac{2z}{1-z^2}$

Find the least number of points plotted on the circle .

finding the coefficient of ${t}^{20}$ in the expansion of ${({t}^{3}-3{t}^{2}+7t+1)}^{11}$

Write 1000 using three 13s

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