MATH_009B_060_11F.jlim028.0.1_INTRODUCTION_TO_WEBWORK

MATH_009B_060_11F.jlim028.0.1_INTRODUCTION_TO_WEBWORK -...

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Jarel Lim MATH 009B 060 11F Assignment 0.1 INTRODUCTION TO WEBWORK due 10/07/2011 at 11:59pm PDT 1. (1 pt) This problem demonstrates a WeBWorK Matching question. Match the statements defined below with the letters labeling their equivalent expressions. You must get all of the answers correct to receive credit. 1. x is greater than or equal to 4 2. The distance from x to 4 is less than or equal to 1 3. x is any real number 4. x is greater than 4 5. x is less than or equal to 4 A. 4 < x B. - < x < C. x 4 D. | x - 4 | ≤ 1 E. x 4 For this problem WeBWorK only tells you that all your answers are correct or that at least one is wrong. This makes the prob- lem harder and is usually used only for T/F and matching ques- tions. The idea is to encourage you to think rather than to just try guessing. If you are having trouble reading the mathematics on the screen, this means that you are using ”text” mode. If you are using Netscape or MSIE then you can get an easier to read ver- sion of the equations by returning to the problem list page (use the button at the top of this page) and choosing ”formatted-text” or ”typeset” instead of ”text”. Sometimes there is a 15-20 sec- ond delay in viewing a problem in ”typeset” mode the first time. Correct Answers: C D B A E 2. (1 pt) This problem demonstrates how you enter function answers into WeBWorK. First enter the function sin x . When entering the function, you should enter sin(x), but WeBWorK will also accept sin x or even sinx. If you remember your trig identities, sin(x) = - cos(x+pi/2) and WeBWorK will accept this or any other func- tion equal to sin(x), e.g. sin(x) +sin(x)**2+cos(x)**2-1 We said you should enter sin(x) even though WeBWorK will also accept sin x or even sinx because you are less likely to make a mistake. Try entering sin(2x) without the parentheses and you may be surprised at what you get. Use the Preview button to see what you get. WeBWorK will evaluate functions (such as sin) before doing anything else, so sin 2x means first apply sin which gives sin(2) and then mutiple by x. Try it. Now enter the function 2cos t . Note this is a function of t and not x . Try entering 2cos x and see what happens. Correct Answers: sin(x) sin(2*x) 2*cos(t) 3. (1 pt) This problem demonstrates how you enter function answers into WeBWorK. First enter the function log x . (If you have not encountered this particular function yet, you will soon.) When entering the function, you should enter log(x), but WeBWorK will also ac- cept log x or even logx. WeBWorK will accept this or any other function equal to log(x), e.g. log(x) + log(10 ˆ x) - x . It is better to enter log(x) even though WeBWorK will also
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MATH_009B_060_11F.jlim028.0.1_INTRODUCTION_TO_WEBWORK -...

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