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Questions Asked

across:
Group Title
Test your recursion skills.
Given an integer array `a` of size `n`, write a recursive function with prototype…
 updated one year ago
 23 replies
 1 Medal
Mathematics

across:
Group Title
https://dl.dropbox.com/u/12189012/OS.pdf
 updated 2 years ago
 2 replies
 1 Medal
Mathematics

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Let's do some cool math:
A tank in the form of a rightcircular cylinder standing on end is leaking water through a circular hole in its …
 updated 2 years ago
 16 replies
 2 Medals
Mathematics

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Group Title
.
 updated 2 years ago
 4 replies
 1 Medal
Mathematics

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Quick question: what's the \(\LaTeX\) symbol for the closed surface integral?
 updated 2 years ago
 14 replies
 4 Medals
Mathematics

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Whilst studying the heat equation, I ran into the equality\[e(x,t)=c(x)\rho(x)u(x,t),\]where \(e\) is the thermal energy density, \(c\) is t…
 updated 2 years ago
 8 replies
 1 Medal
Mathematics

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Group Title
Do you have too much free time on your hands?
 updated 2 years ago
 7 replies
 5 Medals
Mathematics

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A student asked me to prove\[\nabla\times\left(\vec F\times\vec G\right)=(\vec G\cdot\nabla)\vec F(\vec F\cdot\nabla)\vec G+(\nabla\cdot\ve…
 updated 2 years ago
 10 replies
 3 Medals
Mathematics

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Let's go over the derivation of\[\sum_{i=1}^{n}i^2=\frac{n(n+1)(2n+1)}{6}\]
 updated 2 years ago
 16 replies
 2 Medals
Mathematics

across:
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Let's go over the derivation of\[\sum_{i=1}^{n}i^2=\frac{n(n+1)(2n+1)}{6}\]
 updated 2 years ago
 4 replies
 2 Medals
Mathematics

across:
Group Title
Am I the only one who, as soon as typing openstudy.com in the address bar, minimizes the window to a speck and hurriedly logs in?
Maybe i…
 updated 2 years ago
 103 replies
 19 Medals
Mathematics

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Who here plays StarCraft 2?
 updated 2 years ago
 6 replies
 No Medals Yet
Mathematics

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If my memory serves me right, "metamathematics" would be "mathematics about mathematics."
Then, I would like to ask, how did the \(\sqrt…
 updated 2 years ago
 3 replies
 1 Medal
Mathematics

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¿Me pudiesen recomendar un buen libro de geometría diferencial? Para aquellos que han estudiado el tema: ¿qué les pareció? Aparentemente, se…
 updated 2 years ago
 12 replies
 2 Medals
Mathematics

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Dwarf Fortress
 updated 2 years ago
 15 replies
 7 Medals
Mathematics

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\[\begin{align}
x^1+y^1+z^1&=0\\
x^3+y^3+z^3&=3\\…
 updated 2 years ago
 13 replies
 6 Medals
Mathematics

across:
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This one should be fun:
http://dl.dropbox.com/u/12189012/fact.html
 updated 2 years ago
 25 replies
 3 Medals
Mathematics

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What Only Happens in OS  II
 updated 2 years ago
 11 replies
 9 Medals
Mathematics

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Funsie:
@bahrom7893 has \(x\) bananas. To prevent a mischievous monkey from stealing his precious assets, he hid them in seven tiny trunks,…
 updated 2 years ago
 3 replies
 1 Medal
Mathematics

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Funsie: How many positive divisors does\[340000000000000000000000000000000000000\]have? :P
This is actually doable.…
 updated one year ago
 42 replies
 10 Medals
Mathematics

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What Only Happens in OS  I
 updated 2 years ago
 13 replies
 3 Medals
Mathematics

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This question is just for fun: Tell me what the last digit of \(3^{1234567890}\) is. :)
Then tell me what the last two digits are.…
 updated one year ago
 30 replies
 9 Medals
Mathematics

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JBb ve eBB kQO GQHm ob bsLBe CcBHYbvVw bQ TgsTL bkoe cgQmgsDDoHm TksGGBHmB QcBH. qkoe oe s DQHQsGcksNBboT TockBg bksb DsLBe BSTGveoFB veB Q…
 updated one year ago
 20 replies
 10 Medals
Mathematics

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I don’t know if this has been suggested before, and I would first look it up if I could, but someone posted an interesting idea in the math …
 updated 2 years ago
 9 replies
 9 Medals
Mathematics

across:
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Recommend me a good math movie that is not the superb "A Beautiful Mind" nor that one of the boy who shoots up rockets. Also, I don't like p…
 updated 2 years ago
 15 replies
 7 Medals
Mathematics

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plz help soolve prolbem 5 + 3 / 2 ^ 3 + 2  4 / 3  16 sqrt(17) = y 2x^2. 3 graph kthxbye
???…
 updated 2 years ago
 6 replies
 4 Medals
Mathematics

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"OS should have an introduction to OS walk through for first timers."
http://openstudy.com/study#/updates/4f0b3b88e4b014c09e64bd65
 updated 2 years ago
 3 replies
 7 Medals
Mathematics

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Group Title
How many prime numbers are there between 1,000,000 and 1,100,000?
 updated 2 years ago
 14 replies
 2 Medals
Mathematics

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I am having trouble understanding the theorem below, so I will post it here as a reminder to myself to review it as often as I can. Also, I …
 updated 2 years ago
 4 replies
 3 Medals
Mathematics

across:
Group Title
Two groups of rats were raised separately, each with one of the following two kinds of music:
(1) http://www.youtube.com/watch?v=AWggPLXeOk…
 updated 2 years ago
 5 replies
 4 Medals
Mathematics
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