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Older Activity
Today,
11:26 AM
JeffM
replied to a thread
Partial Differential
in
Calculus
Halls Viona is reading some book in physics that seems to be more than a bit casual in its use of mathematical notation. She really needs to give...
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2 replies | 70 view(s)
Today,
10:57 AM
Dr.Peterson
replied to a thread
Complex numbers
in
Intermediate/Advanced Algebra
Can you show your work, so we can see why you think it didn't lead to the correct answer (or correct form)? It isn't clear what you are lacking.
see more
2 replies | 27 view(s)
Today,
10:51 AM
Dr.Peterson
replied to a thread
Is y = (x^2−1) / (x−1) , x≠1 belong to two-variables linear equation?
in
Beginning Algebra
I would agree. It is a linear equation with an added restriction, not a true linear equation.
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1 replies | 48 view(s)
Today,
10:39 AM
Subhotosh Khan
replied to a thread
Complex numbers
in
Intermediate/Advanced Algebra
\displaystyle{\left^{80}} = \displaystyle{\left^{80}} continue....
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2 replies | 27 view(s)
Today,
10:39 AM
Denis
replied to a thread
Mad crypt
in
Math Odds & Ends
I = 1 = indicator = "letter#1 of Dalmations". Like it now? :rolleyes:
see more
2 replies | 90 view(s)
Today,
10:34 AM
HallsofIvy
replied to a thread
Directional derivative doubt
in
Calculus
Consider the "direction" making angle \theta with the x-axis and let m= tan(\theta). A line through (0, 0) in that direction is of the form y= mx. ...
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1 replies | 100 view(s)
Today,
10:23 AM
HallsofIvy
replied to a thread
Partial Differential
in
Calculus
For a general function of two variables, that is wrong. The definition of "differential" of a function of one variable is df= \frac{df}{dx}dx. But...
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2 replies | 70 view(s)
Today,
10:15 AM
HallsofIvy
replied to a thread
Reduction Formula and factorials
in
Calculus
Did you consider "proof by induction"? For fixed m do an induction on n. If n= 0, we have \int_0^1 x^m dx= \left_0^1= \frac{1}{m+1}=...
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1 replies | 58 view(s)
Today,
10:00 AM
Jack10
started a thread
Complex numbers
in
Intermediate/Advanced Algebra
Hi I’m wanting to find ((1+i*sqrt(3))/(1-i))^80 in algebraic form. I can get the correct answer by changing into exp form then applying the power...
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2 replies | 27 view(s)
Today,
09:27 AM
Subhotosh Khan
replied to a thread
Projected Gradient Descent
in
Advanced Math
Can you please define "gradient projection" method for us?
see more
1 replies | 34 view(s)
Today,
08:52 AM
lev888
replied to a thread
≥ 25 and < 8
in
Arithmetic
1. Equal or greater than 25 2. Less than 8
see more
2 replies | 61 view(s)
Today,
06:59 AM
HD5450
started a thread
Projected Gradient Descent
in
Advanced Math
Part (a) and part (b) is pretty easy but for part (c) I don't know how you would start the problem, I tried to look online for examples but all I...
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1 replies | 34 view(s)
Today,
06:55 AM
Subhotosh Khan
replied to a thread
≥ 25 and < 8
in
Arithmetic
If we write: x < y That means that x is lesser than y. If we write: x > y
see more
2 replies | 61 view(s)
Today,
05:58 AM
Bronn
started a thread
Reduction Formula and factorials
in
Calculus
Show Imn =int( xm (1 - x)n, x=0..1) = m!n!/(m+n+1)! really having trouble with this one. first thing I tried was just integrating by...
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1 replies | 58 view(s)
Today,
05:08 AM
HD5450
started a thread
Pruning in branch and bound method
in
Advanced Math
A certain minimization integer program has two integer variables x and y (among other decision variables that are not required to be integers)....
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0 replies | 47 view(s)
Today,
05:07 AM
Viona
started a thread
Partial Differential
in
Calculus
Hello, In a book I found that for f(x,t): But I could not remember this rule of partial differentiation. Any help? Thanks
see more
2 replies | 70 view(s)
Today,
03:25 AM
majid
started a thread
≥ 25 and < 8
in
Arithmetic
≥ 25 : does it mean value equal to 25 or less than 25 ? < 8: does it mean value greater than 8?
see more
2 replies | 61 view(s)
Today,
12:22 AM
Jomo
replied to a thread
Need some prblems with soultions
in
Finance/Business Math
Aw shucks I thought that we were buddies. And I need the interest money. OK, so can you loan me about $2500. I will pay you back in February 2040.
see more
7 replies | 127 view(s)
Today,
12:06 AM
Denis
replied to a thread
Need some prblems with soultions
in
Finance/Business Math
The feeling is not mutual!
see more
7 replies | 127 view(s)
Yesterday,
11:54 PM
Jomo
replied to a thread
Proving equivalent functions with graphs
in
Intermediate/Advanced Algebra
So do I!
see more
6 replies | 137 view(s)
Yesterday,
11:50 PM
Jomo
replied to a thread
word question
in
Pre-Algebra
How many times are you going to repeat this story?
see more
7 replies | 157 view(s)
Yesterday,
11:39 PM
Yoseph
started a thread
Is y = (x^2−1) / (x−1) , x≠1 belong to two-variables linear equation?
in
Beginning Algebra
I have an equation as below: y=x2−1x−1,x≠1 Question: Does it belong to two-variables linear equation? My effort: The equation can be...
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1 replies | 48 view(s)
Yesterday,
11:36 PM
Denis
replied to a thread
word question
in
Pre-Algebra
I know I'm bright: my mother called me sun... Not outstanding, but instanding (in the corner)...
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7 replies | 157 view(s)
Yesterday,
11:36 PM
skeptipus
replied to a thread
Proving equivalent functions with graphs
in
Intermediate/Advanced Algebra
Thank you for your time, Jomo. I was in the process of making a reply when Dr.Peterson had posted the answer to my question.
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6 replies | 137 view(s)
Yesterday,
11:34 PM
skeptipus
replied to a thread
Proving equivalent functions with graphs
in
Intermediate/Advanced Algebra
Thank you very much, Dr. Peterson! :-D:-D
see more
6 replies | 137 view(s)
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