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Today,
11:42 PM
topsquark
replied to a thread
Method of solving
in
Intermediate/Advanced Algebra
We do it for non-linear equations as well. :shock: -Dan
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3 replies | 30 view(s)
Today,
11:39 PM
topsquark
replied to a thread
Li'l math puzzle
in
Math Odds & Ends
As a Physicist I'd do it this way: 3 * 8 = 24. The other terms are merely a perturbation and are therefore non-relevant. (Hey, if I'm allowed to...
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3 replies | 37 view(s)
Today,
11:36 PM
topsquark
replied to a thread
Shrodinger's equation step
in
Differential Equations
Minor correction: Dr. Peterson is correct but there is a bit of a typo in the OP: We are using \hbar \equiv \dfrac{h}{2 \pi} and not Planck's...
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2 replies | 16 view(s)
Today,
11:17 PM
Dr.Peterson
replied to a thread
Stuck on limit question (limit of e): [e^{a/x} + 1] / [e^{b/x} + 1] = a + b
in
Calculus
What is the derivative of a/x? (Not of ax!)
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3 replies | 44 view(s)
Today,
11:03 PM
Dr.Peterson
replied to a thread
Shrodinger's equation step
in
Differential Equations
I think, if I'm interpreting your equations correctly, that you are asking how to get from \displaystyle -\frac{h^2}{2m} \frac{d^2\psi}{dx^2} +...
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2 replies | 16 view(s)
Today,
10:34 PM
Vol
started a thread
Shrodinger's equation step
in
Differential Equations
In schrodinger's equation it says -h^2/2m d^2psi/dx^2 + 1/2mw^2x^2psi = Epsi which is equal to d^2psi/dx^2 + (2mE/h^2 - m^2w^2/h^2 times...
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2 replies | 16 view(s)
Today,
09:45 PM
sinx
replied to a thread
Question about circumference
in
Geometry and Trig
in a way it is. the length you describe will have the same measurement as the circumference.
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5 replies | 67 view(s)
Today,
09:36 PM
sinx
replied to a thread
Get distance from XY position unto the nearest point of a square
in
Geometry and Trig
distance=2+y2]1/2
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3 replies | 43 view(s)
Today,
08:17 PM
Denis
replied to a thread
Army crypt
in
Math Odds & Ends
Sorry...twas my "1 clue per day" for today...
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18 replies | 174 view(s)
Today,
08:12 PM
Denis
replied to a thread
Li'l math puzzle
in
Math Odds & Ends
Unfortunately, no tricks allowed :twisted:
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3 replies | 37 view(s)
Today,
07:11 PM
Harry_the_cat
replied to a thread
two way table: 115 students attend at least one of football, tennis, and running
in
Probability / Statistics
You also know that the total of the football column is 32.
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3 replies | 30 view(s)
Today,
07:07 PM
Harry_the_cat
replied to a thread
Method of solving
in
Intermediate/Advanced Algebra
Balancing the equation maybe??
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3 replies | 30 view(s)
Today,
07:05 PM
pka
replied to a thread
two way table: 115 students attend at least one of football, tennis, and running
in
Probability / Statistics
To solve this question you must complete this table. We are given all necessary information to do that. \begin{array}{*{20}{r}}...
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3 replies | 30 view(s)
Today,
07:03 PM
SirJobz
replied to a thread
Stuck on limit question (limit of e): [e^{a/x} + 1] / [e^{b/x} + 1] = a + b
in
Calculus
So I think I’d made the mistake because in question they said a,b > 0 and you can find a and b value. that’s how I stuck in this question.
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3 replies | 44 view(s)
Today,
05:31 PM
spaceshowfeature1
replied to a thread
I Need the Answers to these Problems: Two cars start out at the same spot....
in
Intermediate/Advanced Algebra
Thanks everyone!
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5 replies | 109 view(s)
Today,
05:28 PM
DRAUXEN
replied to a thread
Get distance from XY position unto the nearest point of a square
in
Geometry and Trig
Outside only. I thought that there's was a formula to do it all at once, I means, without checking in what side is the point. In that way, I...
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3 replies | 43 view(s)
Today,
05:14 PM
tkhunny
replied to a thread
Method of solving
in
Intermediate/Advanced Algebra
Failing to do it is called "error". It is not a valid step in any list I ever have encountered. It is a device to remember that equivalence must...
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3 replies | 30 view(s)
Today,
05:11 PM
tkhunny
replied to a thread
Get distance from XY position unto the nearest point of a square
in
Geometry and Trig
Can it be inside? I would extend all four sides of the square, defining 8 external regions. this gives only three things to do, depending on...
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3 replies | 43 view(s)
Today,
04:50 PM
lev888
replied to a thread
Li'l math puzzle
in
Math Odds & Ends
Ok to flip one 3?
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3 replies | 37 view(s)
Today,
04:34 PM
Illvoices
started a thread
Method of solving
in
Intermediate/Advanced Algebra
What is the method of solving called what you do to one side do to the other called? Especially in linear equations
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3 replies | 30 view(s)
Today,
04:32 PM
DRAUXEN
started a thread
Get distance from XY position unto the nearest point of a square
in
Geometry and Trig
(Sorry if I'm posting in the wrong section and my bad english) So, I'm wondering what formula can I use to calculate the distance that there's...
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3 replies | 43 view(s)
Today,
03:35 PM
JeffM
replied to a thread
How to calculate Umbrella type generator
in
Arithmetic
If he is, I am not moving downstream.
see more
5 replies | 53 view(s)
Today,
03:32 PM
Denis
started a thread
Li'l math puzzle
in
Math Odds & Ends
Use 3,3,8,8 to get 24 (all 4 must be used). Allowed is + - * / and ()
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3 replies | 37 view(s)
Today,
03:31 PM
mmm4444bot
replied to a thread
Army crypt
in
Math Odds & Ends
Okay -- you just spoiled it. :cool:
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18 replies | 174 view(s)
Today,
03:29 PM
JeffM
replied to a thread
Probability: There are three white balls in a pocket, a red ball (X), and a blue ball
in
Probability / Statistics
This is a duplicate of a thread at MMF.
see more
2 replies | 37 view(s)
Today,
03:27 PM
mmm4444bot
replied to a thread
How to calculate Umbrella type generator
in
Arithmetic
Very good. Now you know the question does not have a simple answer. You need a lot of people working in many different fields of expertise. :cool:
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5 replies | 53 view(s)
Today,
03:21 PM
Dr.Peterson
replied to a thread
Set Theory Expression Simplification: {[(A∪B) ∩ C]' ∪ B'}' ∪ C
in
Intermediate/Advanced Algebra
It will help a lot if you show the actual work, rather than just describe it. As it is, we can't be sure what you did, and whether you did it...
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1 replies | 21 view(s)
Today,
03:11 PM
Dr.Peterson
replied to a thread
two way table: 115 students attend at least one of football, tennis, and running
in
Probability / Statistics
What was your answer? Maybe it is really correct. If you show us your table, and if necessary tell us how you filled it out, we can see if there...
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3 replies | 30 view(s)
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