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Yesterday,
10:46 PM
m2017
started a thread
calculating the matrix exponential
in
Intermediate/Advanced Algebra
deleted*
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0 replies | 15 view(s)
Yesterday,
07:58 PM
warwick
started a thread
Self-adjoint boundary conditions
in
Advanced Math
Under what condition on the constants c and c' are the boundary conditions f(b) = cf(a) f'(b) = c'f'(a) self-adjoint for the operator ...
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0 replies | 12 view(s)
Yesterday,
06:21 PM
Denis
replied to a thread
Upcoming Travel
in
Administration Issues
https://www.youtube.com/watch?v=UWY8mAwJ8Dc
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1 replies | 53 view(s)
Yesterday,
04:20 PM
robbiemcleod56
replied to a thread
Need help writing a universal equation involving time and stepping rates.
in
Finance/Business Math
Sorry, I got wrapped up in some other things. I don't actually own the lot, I help out by running it sometimes though. The sign is still accurate...
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36 replies | 2535 view(s)
Yesterday,
03:29 PM
Subhotosh Khan
replied to a thread
scaling standard deviation
in
Probability / Statistics
I wonder if OP was referring to scaling of SD that is done to transform Normal distribution to Z-distribution
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13 replies | 278 view(s)
Yesterday,
03:18 PM
harrison
replied to a thread
scaling standard deviation
in
Probability / Statistics
Fair enough. I will write a better description of what I am looking for.
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13 replies | 278 view(s)
Yesterday,
01:56 PM
Dr.Peterson
replied to a thread
Numerical Problem (Graph)
in
Intermediate/Advanced Algebra
They tell you to look for a pattern in the graphs of A and B. Do you see anything interesting there?
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1 replies | 59 view(s)
Yesterday,
01:52 PM
Dr.Peterson
replied to a thread
Numerical Problem (Consumer Price Index)
in
Intermediate/Advanced Algebra
You don't really need to know anything about the consumer price index. What you do need to know is how percent increases combine. One of the...
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1 replies | 44 view(s)
Yesterday,
01:43 PM
diogomgf
replied to a thread
Linear Algebra - Demonstration problem
in
Intermediate/Advanced Algebra
I am stuck trying to figure out how to approach the general proof. Substituting k for 2, will prove it is correct. Also for 3, etc... (by...
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2 replies | 42 view(s)
Yesterday,
01:24 PM
Subhotosh Khan
replied to a thread
Surface Area of a Sphere.
in
Calculus
First sketch the given function (y=sqrt(r2 - x2) and follow instruction. Share your work so that we know where to begin to help you.
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1 replies | 37 view(s)
Yesterday,
01:21 PM
Subhotosh Khan
replied to a thread
Calculus II Help; Centroid of the region
in
Calculus
Hint: Approximately sketch the functions and estimate the points of intersection for limits of integration. Please share your work so that we know...
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1 replies | 30 view(s)
Yesterday,
01:17 PM
Subhotosh Khan
replied to a thread
Linear Algebra - Demonstration problem
in
Intermediate/Advanced Algebra
This problem will be solved most efficiently through "induction". Please share your work so that we know where you are stuck.
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2 replies | 42 view(s)
Yesterday,
01:03 PM
pka
replied to a thread
[High School Geometry] Word problem
in
Geometry and Trig
The problem is students do not understand the term "look up". They know what "to Google" means.
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6 replies | 121 view(s)
Yesterday,
12:25 PM
Dr.Peterson
replied to a thread
[High School Geometry] Word problem
in
Geometry and Trig
Yes, we say that a circle circumscribes a triangle when it passes through all the vertices: https://en.wikipedia.org/wiki/Circumscribed_circle,...
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6 replies | 121 view(s)
Yesterday,
12:16 PM
Jnash1997
started a thread
Stability in Euler method for integration
in
Differential Equations
So I'm not too sure whether this is to go into this section or the advanced maths section. I'm doing the Euler method of integration and have been...
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0 replies | 29 view(s)
Yesterday,
12:01 PM
Denis
replied to a thread
[High School Geometry] Word problem
in
Geometry and Trig
MathDude, go here: https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-circum-in-circles/v/constructing-circumscribing-circle ...then...
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6 replies | 121 view(s)
Yesterday,
11:49 AM
Claire007
started a thread
Surface Area of a Sphere.
in
Calculus
Verify the surface area of a sphere of radius r is: S=4pir2 by finding the surface area of the solid formed when the semi-circle given by: y=sqrt(r2...
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1 replies | 37 view(s)
Yesterday,
11:45 AM
Claire007
started a thread
Calculus II Help; Centroid of the region
in
Calculus
Find the Centroid of the region bounded by y=sqrt(x) and y=x/2. I'm so lost with how to even start please help :)
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1 replies | 30 view(s)
Yesterday,
11:45 AM
Denis
replied to a thread
Products Array Puzzler
in
Math Odds & Ends
Got it! 3rd row has 3 8's All digits required except "6"
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1 replies | 47 view(s)
Yesterday,
11:38 AM
diogomgf
started a thread
Linear Algebra - Demonstration problem
in
Intermediate/Advanced Algebra
Hello every one, I got stuck in another linear algebra problem: Let A2x2 = Show that Ak =
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2 replies | 42 view(s)
Yesterday,
11:09 AM
Denis
replied to a thread
Cryptic Regards?
in
Math Odds & Ends
BUT BUT it didn't HAVE to be plural...could indicate plural or possessive...no?
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7 replies | 382 view(s)
Yesterday,
10:26 AM
sinx
replied to a thread
[High School Geometry] Word problem
in
Geometry and Trig
by circumscribe; do you mean the circle passes thru all three corners of the triangle? or does the circle only have to pass thru A, and be outside...
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6 replies | 121 view(s)
Yesterday,
08:53 AM
Denis
replied to a thread
$ crypt
in
Math Odds & Ends
Mais oui!
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2 replies | 71 view(s)
Yesterday,
07:02 AM
mmm4444bot
started a thread
Products Array Puzzler
in
Math Odds & Ends
Numbers shown outside the shaded array are products, each obtained by multiplying four numbers (in a row or in a column). Pick numbers from 1...
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1 replies | 47 view(s)
Yesterday,
07:00 AM
mmm4444bot
replied to a thread
Basic Math Puzzle Grid (Add, Subtract, Multiply, Divide)
in
Math Odds & Ends
Bueno :cool:
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3 replies | 126 view(s)
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