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by stapel_eliz
Sun May 03, 2015 5:22 pm
Forum: Uncategorized
Topic: two geodesics are parallel transports along another geodesic
Replies: 1
Views: 28

Re: two geodesics are parallel transports along another geodesic

Problem 8.3. Transversals through a Midpoint If two geodesics r and r' are parallel transports along another geodesic l, then they are also parallel transports along any geodesic passing through the midpoint of the segment of l between r and r'. Is ( this ) what you're talking about? If so, are the...
by stapel_eliz
Mon Mar 23, 2015 8:29 pm
Forum: Matrix (Linear) Algebra
Topic: Help with this matrix proof!
Replies: 1
Views: 270

Re: Help with this matrix proof!

Prove that if A and B are m x m matrices, A is invertible, and C is the inverse of A, then e^(ABC)=A*e^(B)*C ? Use the identities A(E + F)C = AEC+AFC and (AEC)^n = AE^nC How does your book define raising the natural exponential e to a power, with that power being a matrix? Note: In general, (AB...
by stapel_eliz
Sun Mar 15, 2015 12:16 pm
Forum: Matrix (Linear) Algebra
Topic: 2 Linear Transformation Questions
Replies: 1
Views: 195

Re: 2 Linear Transformation Questions

F: R4--->R3 is the function defined by: F(x)= x1 + 2x2 +x3 2x1 +4x2 +7x3 + 5x4 x1 +2x2 +6x3 +5x4 Find the matrix of F, i.e. the matrix N such that F(x)= Nx. How is "Nx" defined? What is "N"? Find all values of t such that the set Y= {y1,y2,y3} is linearly dependent in R3, where ...
by stapel_eliz
Thu Feb 26, 2015 2:36 pm
Forum: Discrete Math
Topic: Find two proofs for the identity
Replies: 4
Views: 586

Re: Find two proofs for the identity

What is "the double counting technique"? Does that refer to "combinatorial" methods? What is "the set" that you're supposed to be "counting"? Are the "two formulas" meant to be the two sides of the identity, so Formula 1 is C(2n, n) and Formula 2 is ...
by stapel_eliz
Tue Feb 03, 2015 3:43 pm
Forum: News
Topic: forum upgrade in progress
Replies: 0
Views: 584

forum upgrade in progress

The script which runs this forum has been updated by the provider in a manner which has created the need for a partial "clean" install. As a result, the appearance and some features of the forum currently have a changed appearance. The forum appears to be functional. If you encounter any e...
by stapel_eliz
Fri Jan 16, 2015 12:05 pm
Forum: Beginning Algebra
Topic: Domain and Range of a relation
Replies: 5
Views: 977

LJH wrote:Yes D is domain and R is Range. The instructions say to find the domain and range of this relation.

Okay. But the domain and range will depend upon what the function is. So kindly please provide the requested information: Is this y as a function of x, or x as a function of y? Thank you! :wink:
by stapel_eliz
Fri Jan 16, 2015 12:04 pm
Forum: Intermediate Algebra
Topic: reverse formula
Replies: 4
Views: 720

The heat emitted from a radiator or heating panel depends primarily on the temperature difference between the radiator and the surrounding air. The heat emission can be expressed as: P = P50 [ (ti - tr) / ln( (ti - ta) / (tr - ta) ) 1 / 49.32 ]n As noted earlier, the expression on the right-hand si...
by stapel_eliz
Fri Jan 09, 2015 3:27 am
Forum: Calculus
Topic: Calculus project
Replies: 2
Views: 529

"Real life" projects can quickly become unexpectedly complex. Maybe it would be wise to spend some time looking at projects that others have posted online...? :wink:
by stapel_eliz
Sun Jan 04, 2015 5:14 pm
Forum: Intermediate Algebra
Topic: Solve this problem, someone who's REALLY good at Algebra 2.
Replies: 1
Views: 609

Solve this problem That's kinda your job. But we'll be glad to help you do it. :D Dr. Bones takes a blood sample and finds that it contains 1300 flu viruses per cubic millimeter and is increasing.... After 5 minutes, the virus count is up to 1875. After five more minutes, it is 2400. They have give...
by stapel_eliz
Fri Jan 02, 2015 5:17 am
Forum: Trigonometry
Topic: Missing intermediate results?
Replies: 3
Views: 503

Re: Missing intermediate results?

This time, both of the squared-sine terms became simple sines. I would guess that it's a typo. However, not knowing what comes after, it's hard to say for sure.

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