Tab Content
• Yesterday, 11:17 PM
"Solvable" can mean different things! Your equation will turn into a fourth-degree equation. I took a non-trigonometric approach, and ended up...
1 replies | 31 view(s)
• Yesterday, 09:00 PM
Dr.Peterson replied to a thread Calculus II Question in Calculus
So, you are revolving the region bounded by these curves about the y-axis? And since both are defined by x as a function of y, the natural way is to...
2 replies | 26 view(s)
• Yesterday, 07:40 PM
You haven't said what makes one choice "correct". Perhaps you are asking this: if one set of 25 is considered correct (e.g. by being the combination...
3 replies | 104 view(s)
• Yesterday, 06:09 PM
I don't know what you mean here; in this problem, following the usual notation, A, B, C, and D are points, not lines or triangles! Do you...
3 replies | 41 view(s)
• Yesterday, 05:57 PM
One place to start is to read the statements of the theorems, and perhaps look at some examples of how they can be applied. Do you have those...
5 replies | 52 view(s)
• 12-12-2017, 11:13 PM
So, you don't actually have any specific reason to think the formula is wrong and you are being shortchanged, as you initially said ("Their...
9 replies | 241 view(s)
• 12-12-2017, 10:25 AM
As I said previously, your 0.0625/1 is a usage within your work, not a final answer or a communication. That's different from the last thing I had...
9 replies | 158 view(s)
• 12-12-2017, 09:59 AM
The important thing is that what you are asking about is not just a usage within your own work, but how things are expressed in communicating with...
9 replies | 158 view(s)
• 12-12-2017, 09:52 AM
Before I try looking into the specific examples, I have to ask another question. (Asking yourself the right questions is a large part of doing math...
10 replies | 413 view(s)
• 12-11-2017, 11:08 PM
To be a little more precise, 0.5:1 is a reasonable format in which to state a ratio (of certain types); and \dfrac{0.5}{1} is a valid expression to...
9 replies | 158 view(s)
• 12-11-2017, 09:36 PM
Certainly there's nothing invalid about it; you can obviously calculate its value, if that's all that matters. The question is, why are you doing...
9 replies | 158 view(s)
• 12-11-2017, 09:32 PM
If we need to come up with a better theoretical formula, we might have to dig into this level of detail and more. At the moment, I'm more interested...
9 replies | 241 view(s)
• 12-11-2017, 09:11 PM
If you are very new to algebra, and have not learned how to work with more than one variable, then you might try defining x and Rerun's age. Then...
4 replies | 116 view(s)
• 12-11-2017, 09:06 PM
I'm new to the site and don't have a lot of experience with its limitations; but one possibility is to upload the picture to some picture sharing...
8 replies | 335 view(s)
• 12-11-2017, 06:04 PM
Have you followed the discussion and tried doing what I said to do? You can find a rather simple real solution; the complexity I mentioned is largely...
11 replies | 325 view(s)
• 12-11-2017, 05:52 PM
This made me aware that I had missed the fact that all three meet, which will make a second equation; my first equation simplifies to 4/b -...
3 replies | 115 view(s)
• 12-11-2017, 11:11 AM
I managed to enlarge your pictures enough to figure out what is going on. They are applying equation (3.2) as stated, which integrates from -∞ to...
1 replies | 72 view(s)
• 12-11-2017, 12:39 AM
As he said, "ω, ω² are the cube roots of unity", that is, they are those two values you refer to; and the equation, x=1+ω^x+ω^(2x) is symmetric in ω,...
11 replies | 325 view(s)
• 12-10-2017, 10:22 PM
I got a quadratic equation in b (with a and c as parameters) that I could solve by the quadratic formula. It's not very pretty. The equation...
3 replies | 115 view(s)
• 12-10-2017, 03:13 PM
We can't really help you solve a problem without knowing what it is. I take it that what you sent us is just your attempted reconstruction of what...
5 replies | 159 view(s)
• 12-10-2017, 02:51 PM
No, it was specified, in the second submission, that ω is a given constant (one of the non-real cube roots of 1), not a variable. So this is not...
11 replies | 325 view(s)
• 12-10-2017, 10:29 AM
I assume you meant x=1+ω^x+ω^(2x) . Ordinarily I would not expect an equation like this, with the variable both in an exponent and outside, to be...
11 replies | 325 view(s)
• 12-10-2017, 10:13 AM
It isn't clear whether you are saying that you never studied calculus at all, or that you studied it a little but have forgotten it. A course that...
8 replies | 211 view(s)
• 12-09-2017, 11:18 PM
As a (not very active) cacher, I can see the post. Here is the puzzle: Mr Boole invented this stuff, and it is an essential part of computing....
2 replies | 107 view(s)
• 12-09-2017, 11:05 PM
I think you are thoroughly misunderstanding the notation. When we write dQ/dP, it is not a division; it just means the derivative of Q with respect...
8 replies | 211 view(s)
• 12-09-2017, 10:46 PM
In order to help you most effectively, we need to know what you DO know, so we have a place to start. What have you been learning that might be...
4 replies | 156 view(s)
• 12-09-2017, 02:55 PM
I actually had the same thought the moment I wrote that phrase, except that I was thinking of "neo" followed by something else.
17 replies | 552 view(s)
• 12-09-2017, 01:38 PM
Please show us where we can find this exam, since it appears to be missing a lot of information. I searched for a "GCSE Maths Mock Exam", and it...
5 replies | 159 view(s)
• 12-09-2017, 11:35 AM
I've been doing cryptics for a few years, but only occasionally (I've worked halfway through two books of them), and have no confidence that I could...
17 replies | 552 view(s)
• 12-09-2017, 11:27 AM
You should be able to attach a picture; if you have trouble doing that, let us know specifically what goes wrong (including if you just don't see the...
8 replies | 335 view(s)
More Activity

#### Basic Information

Biography:
I was a software engineer for many years, and have been teaching at a community college since 2004. Since 1998, I was a part of Ask Doctor Math, where many of my past answers may be seen (http://mathforum.org/dr.math/).
Location:
Rochester, NY

#### Statistics

Total Posts
172
Posts Per Day
5.45
##### General Information
Last Activity
Yesterday 11:20 PM
Join Date
11-12-2017
Referrals
0