qa 09_1

#$&*

course Mth 277

I worked on this earlier but I just realized we were supposed to submit it to this. 6/11 7pm

Question: `q001: Let P = (3, 5, 9) and Q = (-4, 11, 3), with `A the vector whose initial point is P and whose terminal point is Q.What are the `i , `j and `k components of ?

(NOTE: Temporarily, the ` mark is used to denote a vector, so that `A means the vector A, while `i, `j and `k denote the vectors i, j and k.)

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Your solution:

To move from 3 ->-4 =-7 =i

To move from 5->11 =+6 =j

To move from 9 ->3 =-6 =k

When we put this all together for PQ:

-7i +6j -6k

Confidence=3

OK

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Question: `q002: What is the magnitude of the vector defined in the preceding problem?

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Your solution:

When taking the magnitude, you just take the square root of the sum of each number squared.

||PQ || = || -7 i + 6 j - 6 k || = sqrt( 7^2 + 6^2 + 6^2) = sqrt(121) = 11.

Confidence:3

OK

confidence rating #$&*:

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Given Solution: The magnitude of the vector is found by the Pythagorean Theorem to be

||PQ||=||-7i +6j -6k||=sqrt(7^2+6^2+6^2)=sqrt(121)=11

*** I am already seeing that I am not going to learn well from this and it is going to be more time consuming for me to do it this way. I would prefer to work out each assignment and then check all the answers by paper and pencil. This is easier for me to prepare for test and also to complete the materials. I would also prefer to not have to type out each solution if I obviously know how to do it on paper. Since this is how the tests will also be take, I will post questions that I have problems with. This is just best for my success in the course and to learn the material well.

Below are the questions I need help with and an explanation of what I do not understand: ???

??? `q005. Let `v be the vector from the origin to point P. Sketch the points P and Q and the vectors `v and `A. Then sketch the points at the tip of each of the following vectors, provided the initial point of each is the origin:

`v + .5 `A, `v + 1.5 `A, `v + 2.5 `A.

Based on your sketch mark your estimated locations of the terminal points of each of the following, assuming the initial point for each to be the origin:

`v + 2 `A

`v + 3 `A

`v - 1.5 `A.

Estimate the coordinates of the terminal points of these vectors, based on your sketch.

Calculate the coordinates of the points.

How well can you fit a straight line to these points?

"

@&

You haven't told me what you've been able to do and what you do and do not understand.

You haven't really posed a question; this appears to just be a copy of a problem.

Can you pose this in the necessary format with your best information? If so I'll be more than happy to answer and elaborate.

*@

Please note that you are entering an incorrect access code. I've been manually correcting it, but starting this weekend I will no longer do so, and if you submit an incorrect access code your documents will stop posting.

Please get the code right (for example copy it from the email with which is was sent), put it in a file so you can copy and paste rather than type it, and use it accordingly.