course Mth 151 ???{¯€??????????assignment #001001. Only assignment: prelim asst
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22:29:29 `q001. Explain the difference between x - 2 / x + 4 and (x - 2) / (x + 4). The evaluate each expression for x = 2.
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RESPONSE --> confidence assessment:
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j?????i?¦??v???assignment #001 001. typewriter notation qa initial problems 09-02-2007
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22:33:17 `q001. Explain the difference between x - 2 / x + 4 and (x - 2) / (x + 4). The evaluate each expression for x = 2.
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RESPONSE --> The first equation takes x-2 and divides that by x and then adds that to 4. The second equation takes the answer to x-2 and divides that to the answer for x+4. 2-2/2 + 4 = 4 (2-2) / (2+4) = 0 confidence assessment: 2
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22:37:09 `q002. Explain the difference between 2 ^ x + 4 and 2 ^ (x + 4). Then evaluate each expression for x = 2. Note that a ^ b means to raise a to the b power. This process is called exponentiation, and the ^ symbol is used on most calculators, and in most computer algebra systems, to represent exponentiation.
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RESPONSE --> I understood the general idea of how parentheses change the meaning of equations, but I messed up on the first equation. I should have subtracted the answer to 2/2 from 2 instead of dividing the answer to 2-2 by 2. Enter, as appropriate, an answer to the question, a critique of your answer in response to a given answer, your insights regarding the situation at this point, notes to yourself, or just an OK. Always critique your solutions by describing any insights you had or errors you makde, and by explaining how you can make use of the insight or how you now know how to avoid certain errors. Also pose for the instructor any question or questions that you have related to the problem or series of problems. confidence assessment: 3
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??M???x??~???€??assignment #001 001. typewriter notation qa initial problems 09-02-2007
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22:40:36 `q001. Explain the difference between x - 2 / x + 4 and (x - 2) / (x + 4). The evaluate each expression for x = 2.
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RESPONSE --> The first equation takes x-2 and divides that by x and then adds that to 4. The second equation takes the answer to x-2 and divides that to the answer for x+4. 2-2/2 + 4 = 4 (2-2) / (2+4) = 0 confidence assessment: 2
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22:42:17 `q002. Explain the difference between 2 ^ x + 4 and 2 ^ (x + 4). Then evaluate each expression for x = 2. Note that a ^ b means to raise a to the b power. This process is called exponentiation, and the ^ symbol is used on most calculators, and in most computer algebra systems, to represent exponentiation.
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RESPONSE --> I understood the importance of where the parantheses are placed but I didn't group properly on the first equation. I divided the answer to 2-2 by 2 instead of subtracting 2/2 from 2. confidence assessment: 3
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22:49:32 `q003. What is the numerator of the fraction in the expression x - 3 / [ (2x-5)^2 * 3x + 1 ] - 2 + 7x? What is the denominator? What do you get when you evaluate the expression for x = 2?
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RESPONSE --> The numerator is x-3. The denominator is (2x-5)^2*3x + 1. 2-3= -1 (2x2-5)^2=1 1x6 + 1= 7 -2 = 5 x 14 = 70 confidence assessment: 2
You then start the process over with the next question, clicking on the Next Question/Solution button at top left, etc. &#
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22:52:28 `q004. Explain, step by step, how you evaluate the expression (x - 5) ^ 2x-1 + 3 / x-2 for x = 4.
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RESPONSE --> Only the last part of the equation is the numerator if it's not in paranthesis. It's been a long time since I've had algebra and I have a lot to review! confidence assessment: 3
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23:54:48 *&*& Standard mathematics notation is easier to see. On the other hand it's very important to understand order of operations, and students do get used to this way of doing it. You should of course write everything out in standard notation when you work it on paper. It is likely that you will at some point use a computer algebra system, and when you do you will have to enter expressions through a typewriter, so it is well worth the trouble to get used to this notation. Indicate your understanding of the necessity to understand this notation.
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RESPONSE --> I have to understand the notation in order for the computer program, myself, and the instructor to follow the equation, my notes, and my answer. self critique assessment: 2
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23:58:24 `q005. At the link http://www.vhcc.edu/dsmith/genInfo/introductory problems/typewriter_notation_examples_with_links.htm (copy this path into the Address box of your Internet browser; alternatively use the path http://vhmthphy.vhcc.edu/ > General Information > Startup and Orientation (either scroll to bottom of page or click on Links to Supplemental Sites) > typewriter notation examples and you will find a page containing a number of additional exercises and/or examples of typewriter notation.Locate this site, click on a few of the links, and describe what you see there.
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RESPONSE --> The typewriter notation is given. This is what I would enter on the computer. After I click on 'picture', it shows me what the notation would look like if I were writing it on paper. confidence assessment: 3
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23:59:24 while students in other courses should understand the notation and should understand the more basic simplifications. There is also a link to a page with pictures only, to provide the opportunity to translated standard notation into typewriter notation.
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RESPONSE --> I feel I correctly understood the purpose of this webpage and I will not need a deep understanding of it since I'm a Liberal Art Math student. self critique assessment: 2
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