meta user
network profile
| bio | website | |
|---|---|---|
| location | Netherlands | |
| age | 23 | |
| visits | member for | 1 year, 7 months |
| seen | 5 mins ago | |
| stats | profile views | 14 |
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May 14 |
comment |
Why is a full turn of the circle 360°? Why not any other number? Of course that should be 1/2, not 1/4. |
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May 14 |
comment |
Why is a full turn of the circle 360°? Why not any other number? @Zenon: Personally I think $A = \pi r^2$, $C = 2\pi r$ is nicer than $A = \frac{1}{4} \tau r^2$, $C = \tau r$, if only because it avoids the fraction. |
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Feb 13 |
awarded | Teacher |
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Feb 13 |
answered | Fractions in binary? |
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Oct 4 |
awarded | Commentator |
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Oct 4 |
comment |
What's the probability that Abe will win the dice game? @Bobson: For a d3, wouldn't you normally take a d6 and map 1-2 to 1, 3-4 to 2, and 5-6 to 3? |
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Oct 1 |
comment |
using numbers 1 to 9 only once to equal 1 million I must have missed the step where base-2 '1000000' equals one million. |
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Sep 21 |
comment |
What is $dx$ in integration? This is a good explanation of the origin of the notation, but it doesn't quite explain why we bother to write it down. A big part of what the dx notation does is telling you the variable you're integrating over, and as a bonus parenthesizing the integrand. (The latter is probably why the teacher made the 'full stop' remark.) |
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Jan 21 |
comment |
Given a die, what is the probability that the second roll of a die will be less than the first roll? @Pureferret: Yeah, I agree he could have explained it better. |
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Jan 21 |
comment |
Given a die, what is the probability that the second roll of a die will be less than the first roll? @Pureferret: Considering that 1/6th of the possible rolls have A = B, 5/6th of the possible rolls have either A > B or A < B. Because of symmetry, half of that 5/6th will be A > B rolls, and the other half will be A < B rolls. Therefore the probability for an A > B roll is (5/6)/2 = 5/12. Does that help? Look at wvnl's answer for a formulaic approach to this reasoning. |
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Dec 24 |
comment |
What do you call numbers such as 100, 200, 500, 1000, 10000, 50000 as opposed to 370, 14, 4500, 59000 @David: I was talking about the OP there |
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Dec 23 |
comment |
What do you call numbers such as 100, 200, 500, 1000, 10000, 50000 as opposed to 370, 14, 4500, 59000 @David: And elsewhere tips are different. It's useless to discuss tips without specifying the cultural situation, so let's not get into that on a question not related to the subject. |
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Nov 1 |
comment |
How to sum this series for $\pi/2$ directly? @Srivatsan: Yes, of course. Just making a reference to youtube.com/watch?v=OQSNhk5ICTI |
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Nov 1 |
comment |
How to sum this series for $\pi/2$ directly? @ZevChonoles: Double factorial? What does it mean?! ;) |
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Oct 23 |
comment |
How to prove that $\lim\limits_{x\to0}\frac{\sin x}x=1$? l'Hôpital's rule is easiest: $\lim\limits_{x\to0}\sin x = 0$ and $\lim\limits_{x\to0}x = 0$, so $\lim\limits_{x\to 0}\frac{\sin x}x = \lim\limits_{x\to 0}\frac{\cos x}1 = 1 $ |
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Oct 17 |
awarded | Supporter |
