well, this week, we learned about domain and range of different equations. We are learning this and we learned how to do all of them EXCEPT the one we had on the team test! how lucky are we?!? but that doesn't matter, we won anyway, even if we were against ourselves. woohoo. hahahahhaa. Honestly, my whole highschool experience has revolved around math. Every other class seems like a joke. I don't feel like i'm learning anything else, and i'm spending my weekends learning more math. It's really interesting, that thing I just went to on sunday was realllyyy coool, and i wish we could have a follow up because it was interesting. Just saying, i don't like all the homework and everything but in a way i like it all. ANYWAY, this week, domain and range.
donmain range for a polynomial
always negative infinity, infinity
range WE DON'T KNOWWW!!!
domain and range for fractions.
oh crap, gotta bust out the notes now.
domain-set bottom equal to zero and solve for x(then intervals)
range-take the limit(then intervals)
square roots
domain-set inside=0 and solve for x
set up a number line
seee which side works
absolute value
domain-negative infinity to infinity
range, shift , infinity, or neg infinity, shift.
the easiets one is polynomial so here's an example.
5x^5+6x+1
domain is alwayys neg infinity, infinity
fraction:
3/x-2
x-2=0
x=2
(neg infinity, 2,) u (2, infinity)
range:the bottom is bigger so limit it iss 0
(neg infinity, 0) u ( o, infinity)
and there's two examples
this week was KINDA easy.
it was whack when we learned this and the homework didn't correspond.
but ha.
bye.
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