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Older Activity
Today,
03:09 AM
mmm4444bot
replied to a thread
Method of solving
in
Intermediate/Advanced Algebra
Algebra. :cool:
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4 replies | 38 view(s)
Today,
02:50 AM
mmm4444bot
started a thread
One Dual Crypt?
in
Math Odds & Ends
\quad Find one answer, then find a different answer. Holiday season lacks initial direction for plant (5) & (5)
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0 replies | 3 view(s)
Today,
02:39 AM
mmm4444bot
replied to a thread
Li'l math puzzle
in
Math Odds & Ends
3 8 3 8 8 3 8 8 8 3 8 8 3 8 3 3 8 3 3 3 8 3 3 8 3 3 8 3 8 3 8 8 3 8 8 8 3 8 8 3 8 3 3 8 3 3 3 8 3 3 8 3 3 8 3 8 3 3 3 8 3 3 8 3 3 8 3 8 3 8 8 3 8 8...
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6 replies | 54 view(s)
Today,
12:22 AM
Harry_the_cat
replied to a thread
Li'l math puzzle
in
Math Odds & Ends
If the numbers 3, 3, 8 and 8 are to base 9, then 38 - 8 - 3 works. 389= 3*9+8 = 35 39 = 3 89 = 8
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6 replies | 54 view(s)
Today,
12:10 AM
Harry_the_cat
replied to a thread
Li'l math puzzle
in
Math Odds & Ends
One question : Is it possible? (if not, I dont want to waste my time!!):confused:
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6 replies | 54 view(s)
Yesterday,
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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4 replies | 38 view(s)
Yesterday,
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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6 replies | 54 view(s)
Yesterday,
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 | 26 view(s)
Yesterday,
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 | 54 view(s)
Yesterday,
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 | 26 view(s)
Yesterday,
10:41 PM
Dmsan
started a thread
Help Needed On Vector Problems
in
Calculus
Our class had been doing the cross product, dot product, and vector projection but I'm really not good at it. I am stuck on the Strengthening Set...
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0 replies | 2 view(s)
Yesterday,
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 | 26 view(s)
Yesterday,
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 | 74 view(s)
Yesterday,
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
see more
3 replies | 48 view(s)
Yesterday,
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 | 178 view(s)
Yesterday,
08:12 PM
Denis
replied to a thread
Li'l math puzzle
in
Math Odds & Ends
Unfortunately, no tricks allowed :twisted:
see more
6 replies | 54 view(s)
Yesterday,
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 | 37 view(s)
Yesterday,
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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4 replies | 38 view(s)
Yesterday,
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 | 37 view(s)
Yesterday,
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 | 54 view(s)
Yesterday,
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 | 113 view(s)
Yesterday,
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 | 48 view(s)
Yesterday,
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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4 replies | 38 view(s)
Yesterday,
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 | 48 view(s)
Yesterday,
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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6 replies | 54 view(s)
Yesterday,
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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4 replies | 38 view(s)
Yesterday,
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 | 48 view(s)
Yesterday,
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 | 59 view(s)
Yesterday,
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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6 replies | 54 view(s)
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