Alright, so this week:
Study for Test
Study for Test
Test
Test
Limits
I mostly understand the limits.
There are rules when dealing with these things:
(Note: These apply only when the limit is to infinity)
Rule #1 - When the degree (exponent) of the bottom is GREATER than the degree of the top, the limit is Zero.
Rule #2 - When the degree (exponent) of the bottom is SMALLER than the degree of the top, the limit is infinity. (positive or negative)
Rule #3 - When the degrees are equal, the limit is the coeffecients.
Here are some tips that we got in class:
1) When plugging in a limit and you get something over zero, do not just automatically put ZOMG! TLDNE! (THE LIMIT DOES NOT EXIST!). There are two other choices:
1. Factor and cancel (Not sure what this means...can someone clarify please?)
2. Use the calculator (table function) (take the --> # and add and minus .1, .01, and .001)
2) Limits have to match from left to right (OMG! Can someone help with this? I have no idea how to do left and right limits!)
3) When there is a radical, the limit will always be (highest top coef)/(sqrt(highest bottom coef))
Alex then put some stuff on the board that I'm kinda iffy about:
1) lim sinax
x->0 bx
The limit is a/b
2) lim tanax
x->0 bx
The limit is a/b
Okay, so, The Things I Don't Understand!!
1. The concept of factoring and cancelling when there is something over zero...what does it do? Is that your limit or what?
2. How to find the limit using left and right hand. I have noooo idea how to even begin!
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the limits from both sides of the graph are simple when you remember what to do..
ReplyDeletebut i get confused so, i wont answer that question.
if you cancel something out of a fraction it's a removable at that number..if something is left at the bottom it is an infinate
okay ellie and trina helped me with this so you can plug it into your y= function then hit 2nd graph and it will bring you to a table then look at the answers given to you and solve them and see if both matches.
ReplyDeleteIf you end up canceling something out of a fraction it's a remvoable at that number, and then if something is left at the bottom it's a infinate.
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