## Search found 281 matches

Thu Jan 28, 2016 10:04 pm
Forum: Matrix (Linear) Algebra
Topic: matrix notation
Replies: 1
Views: 366

### Re: matrix notation

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: 772

### Re: One more question: line tangent to y=2 sin(2 x+(3pi/4)) at x=pi/8

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: 594

### Re: Find basis and dimension of a vector space

\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: 532

### Re: x^2: any relation between d(x^2)/dx = 2x and diff. between 1, 4, 9, 16, ..., ?

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: 591

### Re: Markov Chain Help

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: 556

### Re: Stack of 1" balls

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: 487

### Re: Trouble Comprehending Concepts

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: 666

### Re: How to calculate the equation of 2 primes: prime n-6 = prime 1-n

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"?

Sun Oct 11, 2015 5:59 pm
Topic: Solving Rational Inequalities: 1/4(x+2) <= -3/4(x-2)
Replies: 1
Views: 673

### Re: Solving Rational Inequalities: 1/4(x+2) <= -3/4(x-2)

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: 707

### Re: Linear Programming shortest path

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...