- Thu Jan 28, 2016 10:04 pm
- Forum: Matrix (Linear) Algebra
- Topic: matrix notation
- Replies:
**1** - Views:
**60**

Apologies, but I'm drawing a blank. Kindly please provide the exact text (or scan) of the "something" which generated your query. Thank you.

- Wed Jan 06, 2016 9:39 pm
- Forum: Calculus
- Topic: One more question: line tangent to y=2 sin(2 x+(3pi/4)) at x=pi/8
- Replies:
**4** - Views:
**305**

bookwrm98 wrote:So pull out the 2, then do the derivative of sin(f(x)), and the final derivative equals 4cos(2x+(3pi/4)), then just find the line from there. Is that right?

You are correct.

- Tue Dec 15, 2015 3:30 am
- Forum: Matrix (Linear) Algebra
- Topic: Find basis and dimension of a vector space
- Replies:
**4** - Views:
**215**

\mbox{Find the basis and dimension of }\, V,\, W,\, V\, \cap\, W,\, V\, +\, W,\, \mbox{ where} To find the basis (singular) and dimension (singular), what follows would generally be required to be a singular item. But what follows appears to be a listing of (four) spaces. Which interpretation (sing...

- Fri Dec 04, 2015 8:43 pm
- Forum: Calculus
- Topic: x^2: any relation between d(x^2)/dx = 2x and diff. between 1, 4, 9, 16, ..., ?
- Replies:
**1** - Views:
**177**

Is there a relation between the fact that the derivative of x^2 is 2x and that the difference between 1,4,9,16, ... is 3, 5, 7, 9, ...? And why is the difference always 2? Are you perhaps referring to what is discussed on this page starting a little past halfway down the page? One might find it use...

- Fri Nov 20, 2015 11:53 pm
- Forum: Matrix (Linear) Algebra
- Topic: Markov Chain Help
- Replies:
**1** - Views:
**236**

So I know that a Markov chain has the following transition matrix... A = [0.4251 0.0334 0.2417 0.1904 0.1346;0.2354 0.2624 0.1606 0.1185 0.0438;0.0445 0.1936 0.1805 0.1621 0.4802;0.1098 0.042 0.3739 0.2305 0.2436;0.1852 0.4686 0.0434 0.2984 0.0978] Does the above intend the following in standard no...

- Thu Nov 19, 2015 12:58 pm
- Forum: Trigonometry
- Topic: Stack of 1" balls
- Replies:
**2** - Views:
**186**

Four 1-inch balls stacked in a triangular pyramid, 3 on the bottom layer, one on top.... How high is this stack of balls? My best physical measurement is 1.81 with a surface plate, precision balls and a height gauge, but I can't mathematically back it up with the correct answer. Help? My first atte...

- Wed Oct 14, 2015 3:29 pm
- Forum: Matrix (Linear) Algebra
- Topic: Trouble Comprehending Concepts
- Replies:
**2** - Views:
**194**

If the particular text is proving problemmatic, one might consider using a supplementary text. Many have found Schaum's Outlines to be helpful. No-cost online resources are also available, such as this website or this PDF document. Which source might prove most effectual for you will likely be down ...

- Sun Oct 11, 2015 6:00 pm
- Forum: Intermediate Algebra
- Topic: How to calculate the equation of 2 primes: prime n-6 = prime 1-n
- Replies:
**1** - Views:
**282**

charlie wrote:How to calculate the equation of 2 primes: prime n-6 = prime 1-n

What is the meaning of "prime n", "prime 1", "(prime n) - 6", and "(prime 1) - n"?

Kindly please include, within your reply, a complete statement of your efforts thus far. Thank you.

- Sun Oct 11, 2015 5:59 pm
- Forum: Advanced Algebra ("pre-calculus")
- Topic: Solving Rational Inequalities: 1/4(x+2) <= -3/4(x-2)
- Replies:
**1** - Views:
**321**

1/4(x+2) <= -3/4(x-2) By adding +3/4(x-2) I simplify to (x+1)/(x^2 - 4) By what steps did you obtain this result? (Your formatting is ambiguous. Are the variable factors in the numerators or in the denominators?) a) if I solve the same inequality by cross multiplying.... By what logic have you &quo...

- Mon Oct 05, 2015 6:48 pm
- Forum: Intermediate Algebra
- Topic: Linear Programming shortest path
- Replies:
**3** - Views:
**312**

I'm kind of stuck with my a Linear programming taks.... Its about a guy trying to get into as many pubs as possible within 9 hours. There are 14 pubs located on a manhatten map (e.g. Pub 1 has to coordinates 4,9 and so on). The guy is moving at the speed of 1 lag (e.g. from 0,1 to 1,1) in 10 minute...