Review of week four and preview of week five

Hi all,

We have started talking about functions (most common object we will deal with in math) last Tuesday, and have done a practice test. I have put up another test that looks more like your homework, make sure to check it out and ask me if you want me to check your work! Our test is on Tuesday next week. In case you are freaking out right now: no worries, treat the test seriously, be patient and careful, but remember you can regrade to get up to half of lost points back!

Functions are just rules that take inputs  from the domain and give outputs. Any output belong to the range. The character of function is that every input from the domain has to have exactly one output. Therefore to check if something is a function, check everything in the domain and see if there is a unique output. When you talk about a function, make sure to specify the domain and the rule. Examples of functions are: polynomials, rational functions, etc. The domain of polynomials is all real numbers and the domain of rational functions are any real number that don’t make the denominator zero. Functions will not be tested this time.

To sum up the test: you will see problems similar to homework problems on the test, and the domain of the test (look, functions are useful to describe day to day life!) is Chapter 0, from 0.1 to 0.6. If you wish to do more problems from the book for practice, let me know and I will be more than happy to sit with you in a room and do some problems!

Alright, that is it for now. Let me know if you want to talk about anything!

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