OK so this week was a lot different than a normal week. For the first two days of school Mrs. Robinson was not at school and we had to do class work on Domain and Range. Then the last two days of school I'm not sure what went on yet because I missed those days and we probably learned something new, which means I'm going to be lost on Monday when I get back so I'm not really looking forward to that.
Well, this week since we were doing classwork with Domain and Range I guess I'll talk about that. For Domain and Range I understand how to find the domain of a polynomial and how to find the domain of an equation with absolute value. For both of these the Domain is always (- ∞ , + ∞). But for the rest of the work that you do for this I kind of struggle. Last year we never really talked about this stuff in Algebra II and I don't really understand it. I mean I can do it if I look at my notes for about an hour and use them to do the work, but for some reason I just cant get when you use the Us to dived the the answers you get and when you get three answers how you get them and what not. I don't know, I'm just confused a little.
Yeah. I know. I was in your class last year. We never really went over the whole domain and range thing.
ReplyDeleteSo first, your domain for all polynomials is (- ∞ , + ∞). Your range for all odds is (- ∞ , + ∞). BUT the range for all evens is (vertex, - ∞).
ABSOLUTE VALUE
domain=(- ∞ , + ∞).
range=(- ∞ , shift] OR [shift, + ∞).
FRACTIONS
domain-set the bottom=0 solve for x, plug in values for x, eleminating -ves and set up intervals (- ∞ , x)u(x , + ∞).
FRACTIONS DO NOT USE BRACKETS!!!!!!
SQUARE ROOTS
domain-set what is under the radical=0 solve for x, create a number line and plug in values from both sides of your x-value(s) eleminating any -ve values. then set up intervals.
range-graph.
(it is pretty much all the notes you have to just memorize.)