***OFFICIAL AP Calculus BC Thread 2013***

<p>Yeah I thought the Taylor Series question was really hard. In my class I heard nobody got the answer to that and also because my class never really covered it in such detail. I never did a practice test coming into this cause I had so much work that I had to cram in the end, so I guess the lesson taken from this is to study early next time.</p>

<p>First MC was hard, the calculator part was really easy imo. The first part of the free response was hard (polar was difficult imo, I also made a big mistake). The second part was average, the Taylor series question was pretty easy.</p>

<p>Also, will different forms have different curves?</p>

<p>I agree with everything Bradsta said. the first MC were brutal some weird terms on there and visualization type problems. Second MC was easy. for the polar area did anyone get a really complicated answer for the last part of the question? like the velocity vector part? </p>

<p>Oh and on that MC number 91 with the changing height volume of a cone one, was it a or b? b was 96pi/125 i believe. anyone know how to do that?</p>

<p>when you get your scores, do you get two, one for AB and one for BC? and if you get a 5 in BC, are you guaranteed a 5 in AB?</p>

<p>“Was there a question (if yes, letter d ) on the back side of the page?” oh dear…I hope not.</p>

<p>@Remembrance Yes, you get a BC score and and AB subscore. You can get a lower AB subscore than BC subscore, and it happens quite often</p>

<p>Hi- This is my first post!
@gjstewart14
I think that was a related rates problem- Find the relationship between r and h, sub r in terms of h, into V and then do dV/dt=derivative of V *dh/dt and solve for dh/dt. I don’t remember the answer, but is that similar to what you did?
Anybody have a clue on how to do part a on the last question on the taylor series?</p>

<p>I forgot exactly what part A was asking for O_O</p>

<p>i got A, which was like 32/25pi</p>

<p>yeah I think that was it</p>

<p>alright. here are some of the FRQ answers i remembered (correct me if i am wrong):
the first one, take the deriv of G(t) and plug in 5, i got like -24.6? then, the total amount arrived was the integral of G(t), which is around 826 something. then the rate is decreasing because the input is smaller than the output. last one i had the formula done but not the result.
the polar area one, first one was to take integral of r=4-2sinA from pi/6 to 5pi/6 and plus integral of r=3 from 5pi/6 to 13pi/6. the next question i didnt remember. next, x=rcos, y=rsin. last one, v=sqtr of (dx/dt)^2+(dy/dt)^2 at t=5. the result is about 47.</p>

<p>How is the AB subscore calculated? Certain questions?</p>

<p>the coffee maker one was easy. just average rate of change and midpoint sum…
the next one, differential equation. first question lim-0 (f(x)+1)/sinx, apply l’hopital rule and get 2. next one… dont remember. the last one, solving differential equation…y=1/(-x^2+2x+1)…something like that.</p>

<p>^^At Remembrance (BTW nice name) AB subscore is calculated from a set of questions within the multiple choice and parts of the Free Response.</p>

<p>Also guys remember We are not supposed to talk about the Free - Response yet. I understand that you guys want to talk about it, but I still wouldn’t post the FRQ topics for the “entire” world to see.</p>

<p>I thought they asked for the velocity vector for the polar question (letter d I believe)? Would that be <dx dt,dy="" dt="">?</dx></p>

<p>if we have different forms would the frq questions be different? I didn’t have a polar area one or anything about a coffee maker</p>

<p>Yea there was form O and G. There might be more but those are the ones I know about.</p>

<p>i thought taylor series was super (i mean really) easy. I am a fan of taylor or mac. series normally and solved entire problems within 3 minutes. last problem was just asking for knowing the general form of other polynomial and other questions were similar to released one</p>

<p>i solved one released test and this year MC calculator parts was just simply easy and simple.</p>

<p>For non calculator portion, i thought harder than what i took. i got 5 on mock test. </p>

<p>so i think curve will be similar to 2008 one since FRQ was generally easier as well as calculator portion.</p>

<p>Our school had two forms: one with polar area (and coffee temp) and one with R and GL.</p>

<p>I got later one. Every FRQ except e^-2x^2 thing, i think i got 9s.</p>