post 17

alright so this week in calc we reviewed, reviewed, reviewed, and took two practice ap tests, which i actually did pretty good on ! :-)

calc exam is tuesday, and i just found out that the packet b rob gave us on friday is due the day of the exam! i thought it was our packet for over the christmas holidays! ahhhhh, i need to get started on that. haha. okay well, i'll explain average rate of change.
you are given a problem y=3t+2 and a time iterval from [0,2] seconds. well, your formula is:
f(b)-f(a)/b-a. 0=a,2=b. so, first you must plug in 0 and 2 to find out what your plug ins will be. so you would get [2,8]. then plug it into your formula, 6/2 = 3. so your answer would be three. don't forget to put your units behind it though, whatever that may be.

i'll also, tell you limit rules for finding infinity because i will never ever ever forget these.

if a limit is approaching infinity:
1. top degree < bottom degree it's equal to 0
2. top degree > bottom degree it's equal to +/- infinity. ****
3. top degree = bottom degree divide leading coefficients.

****find out if it's positive or negative infinity by graphing it in your calculator.

also, i'll throw in that volume for disks and washers is squared, while area is not. although it is the exact same formula. figured i would just say that since a lot of people seem to forget those formulas, when really you only have to remember one.

what i dont get still, is LRAM, MRAM, RRAM, TRAM.
also i kinda forgot how to find the equation of a tangent line. don't make funny of me, but i can't remember to save my life and it's driving me crazy cuz i know how simple it is. also, if anyone wants to go over optimization just to refresh my memory, and all the related rates stuff would be nice too :-)