The blog for Mr. Arocena's classes. Recorded here are assignments, quizzes, tests, projects and the current scores for all teams competing for the Arocena Cup. Occasionally I'll post something else too (most likely pertaining to education)
"It's not that I'm so smart, it's just that I stay with problems longer." - Albert Einstein
Wednesday, September 8, 2010
Math 12 Assignment
Today's assignment: - Complete the Function Review worksheet
Remember that the Domain is the values of X that make the function work. Basically as long as you are not dividing by zero at any point, the Domain can be any number.
The Range is the values that Y can have. If you are having troubles determining the range, replace X with random values and calculate Y. A pattern should start showing up.
heyy. Is there a proper way to actually figure it the domain and range? Sorry, i completely forget how to do this. I just remember last year most of the domains were all real numbers, but other than that i'm lost haha.
Let's see, for the problems I gave you, look for things that make the function undefined.
For example division by zero (so are there values of X that would make the function divide by zero) or square roots of a negative number (so values of X that make a division by negative number). That's an easy way to figure out the domain.
As to the range, if random values of X aren't working, best I can say is to graph the function and look at what values of Y exist on the graph.
The graphing calculator program I used in class is here http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html
Dear Mr.Arocena,
ReplyDeleteI am having a lot of difficulty with the domain and range problems in question 5. I can't quite remember how to do it.
Remember that the Domain is the values of X that make the function work. Basically as long as you are not dividing by zero at any point, the Domain can be any number.
ReplyDeleteThe Range is the values that Y can have. If you are having troubles determining the range, replace X with random values and calculate Y. A pattern should start showing up.
I should make a note that if at some point you are dividing by zero, that particular value cannot be part of the domain.
ReplyDeleteheyy.
ReplyDeleteIs there a proper way to actually figure it the domain and range? Sorry, i completely forget how to do this. I just remember last year most of the domains were all real numbers, but other than that i'm lost haha.
Let's see, for the problems I gave you, look for things that make the function undefined.
ReplyDeleteFor example division by zero (so are there values of X that would make the function divide by zero) or square roots of a negative number (so values of X that make a division by negative number). That's an easy way to figure out the domain.
As to the range, if random values of X aren't working, best I can say is to graph the function and look at what values of Y exist on the graph.
The graphing calculator program I used in class is here
http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html
thanks alot :)
ReplyDelete