<p>I’m very sorry Goldmind. Here is a formula for conjugation of limits. It is a +/- b <-----> a -/+b. basically you multiply the numerator and denominator by the opposite sign. I.e. : (sqroot(x+2) -3)/(x-7). You would multiply both numerator and denominator by (sqroot(x+2) +3). Then you’d distribute on top and bottom, and eventually simplify the problem. Then you can just evaluate. If you don’t understand, just tell me!</p>
<p>Well my teacher isnt doing much … she is just going over sorta like pre req and stuff that we need to know before we study the actuall calculus … so i guess im back in a pre calc class untill she finally wants to start lol -__-</p>
<p>Hahahaha. Well, we had our first exam two days ago over the limits chapter. I made the most simple mistake ever, which was accidentally putting 11pi/6 as sqrt3/1, when it’s obviously sqroot3/2. I can’t believe I actually did that. I had no time whatsoever to go back and check my answers, as my class is like 45 min long. If I didn’t make any other stupid mistakes, then I think I made somewhere in the 90’s on the test. We started differentiation today. My teacher basically showed us how to find the slope of a tangent line with a formula that is similar to difference quotient. The formula is like: (f(c + delta x) - (f(c))/(delta x)) it doesn’t seem bad at all right now, just tedious. 1 problem is like 1/2 to 1 page long haha. It’s definitely going to get harder in the coming days.</p>
<p>lol yeah my calc teacher said that for like the first 4 chapters (in our book atleast) is simple stuff but very long simple stuff lol … but that after the simple stuff it gets really short but really hard … idk how cause when somethings short its usually easier but she knows calc more than me so ill trust her 
… Yeah our classes are 50 mins</p>
<p>Hahaha. It’s not too bad, but I have to rememorize the unit circle again. Later on, the differentiation and integration gets difficult from what I’ve heard.</p>
<p>I’m taking AP Calc AB this year as well. I’m a bit nervous. I got a good IB score for Math SL (6), but I also had a really good teacher. I’ve heard the calc teacher isn’t very good, and he doesn’t really cover what’s needed to do well on the test. Almost the whole class every year gets a 1, and the highest score someone’s received was a 3.</p>
<p>iluvbooks94, you’ll be fine. AP Calculus AB is being taught for the first time at my school. I’m a bit worried, but I think it’s doable. I didn’t even complete pre-cal, so I’m definitely in a worse situation. My trig skills are not the best hahah. </p>
<p>Update: We did the derivative of a tangent line yesterday. Today we learned the derivative of a secant line (difference quotient). Everything seems fine so far, but I know it’s going to get more complex soon. I know that there are 36 derivation properties. Hopefully we won’t have to memorize them all and apply them on a single test.</p>
<p>Tangent lines! Ha. Finding the derivative of a tangent line… Why would you ever do that 
The rules are easy to memorize, don’t worry.</p>
<p>And what I always say to people in Calc AB about limits: There is something called “L’hopital’s rule.” Use it. My teacher was impressed on the limits test which is before derivatives. It’ll save you conjugation, squeeze theorems, factoring, and a bunch of other algebraic manipulation. :)</p>
<p>I’ve heard of it, but I never really learned how to use it. Our teacher didn’t go over neither L’Hopit</p>
<p>I haven’t posted on this thread in a few days, so I thought I might give - those of you who read it - an update on what I’m doing in class. We learned how to do derivatives of higher powers (4,5,6,7) towards the end of last week. Yesterday we learned the shortcut for derivatives using properties rather than expanding the derivative and then simplifying it. Today we learned how to construct an equation of the slope of a tangent line through the use of derivatives. We also incorporated the sine and cosine functions in our derivative properties.</p>
<p>Lol am i the only one who hasnt even started limits yet -__- … we r still sorta like doing the review of the like “what you should know before calculus” stuff … and i really wanna start doing actuall calculus because …
- i like math
- im tired of review i wanna learn new stuff
lmaoo</p>
<p>Are you serious? Lol. Albeit this is like the first time my teacher is teaching AP Calc, I think she’s doing pretty well in terms of covering material. I just wish that my class was longer than 45 min, so we could cover more and no stop midway through a lecture.</p>
<p>Any good online practice resources? Am about to start implicit differentiation.</p>
<p>I ran across this cheat sheet for the AP exam. I’ll post it later. It has some pretty useful formulas. It may be beneficial to start studying in early April-ish.</p>
<p>cool whenever you can post it.</p>
<p>Our teacher has skipped the Pre-Calc review so on to contuinity it is</p>
<p>Nice. Post if you need any help with continuity or limits, as I had a test like two weeks ago on the limits chapter.</p>
<p>ya school start last thursday (Half day, Assembly day, Weekend, Late Start) and yesterday was really our first day so ya we are just beginning. Thanks also <a href=“http://calcchat.com/[/url]”>http://calcchat.com/</a> is an awesome website</p>
<p>thanks for the websites and links so far guys</p>
<p>Update: We did a lot of stuff in Calc today. Multiplication/division of derivatives, rates of change: position function, average velocity, velocity at one point, position formula of free falling object, and product and quotient with the different properties of trig functions with respect to finding the derivative.</p>
<p>I just had my first test yesterday and I will be happy with a 70. No one felt good coming out of the test and I’m pretty sure I failed! What have I gotten myself into?</p>