course Phy 121 I have redone this exercise again. I couldn't find it from before. Please let me know you received it. ½£÷JčśoŌצ¤nD’RŲ¬ĖŽassignment #001
......!!!!!!!!...................................
15:38:11 `q001. Explain the difference between x - 2 / x + 4 and (x - 2) / (x + 4). The evaluate each expression for x = 2.
......!!!!!!!!...................................
RESPONSE --> The difference is that in the second expression which is (x-2)/(x+4) you would do the problems in parenthes first then divide. In the first expression x-2/x+4 you do it starting in the front and working it forward. the answer to the first equation is: x-2/x+4 2-2/2+4 0/6 0 the answer to the second equation is: (x-2)/(x+4) (2-2)/(2+4) 0/6 0 confidence assessment: 3
.................................................
......!!!!!!!!...................................
15:41:56 `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.
......!!!!!!!!...................................
RESPONSE --> You would always do the equation that is in the parenthes first. The answer to the first equation is: 2^x+4 2^2+4 2^6 The answer to the second equation is: 2^(2+4) 2^(6) 12^ confidence assessment: 1
.................................................
......!!!!!!!!...................................
15:45:56 `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?
......!!!!!!!!...................................
RESPONSE --> The numerator is -1 The denominator is -7 You will get -1/-7 which would then turn to 1/7. confidence assessment: 1
.................................................
......!!!!!!!!...................................
15:50:17 `q004. Explain, step by step, how you evaluate the expression (x - 5) ^ 2x-1 + 3 / x-2 for x = 4.
......!!!!!!!!...................................
RESPONSE --> (x-5)^2x-1+3/x-2 ((4-5)^2(4)-1+3/4-2 (-1)^6-1+3/2 1(6)-1+3/2 6-1+3/2 5+3/2 8/2 4 confidence assessment: 2
.................................................
......!!!!!!!!...................................
15:55:22 *&*& 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.
......!!!!!!!!...................................
RESPONSE --> I understand. self critique assessment: 0
.................................................
......!!!!!!!!...................................
15:57:27 `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.
......!!!!!!!!...................................
RESPONSE --> Other problems that can help me understand this math easier. confidence assessment: 0
.................................................
......!!!!!!!!...................................
15:57:53 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.
......!!!!!!!!...................................
RESPONSE --> ok self critique assessment: 0
.................................................