<p>I have Princeton Review's book which unfortunately doesn't say which is which.</p>
<p>So...</p>
<p>Slope fields ARE on AB now, correct?</p>
<p>Also, for AB, do we need to know...</p>
<p>shell method? My teacher says it's off, but the book still has it on.</p>
<p>seperable equations?</p>
<p>and I'll probably come back with more.</p>
<p>Slope fields are on AB.
Shell method for finding volume is on.
Separable equations? What do you mean? Separating differential equations? Parametric ones?</p>
<p>
[quote]
Shell method for finding volume is on.
[/quote]
Actually, as of a few years ago they dropped it from both AB and BC.</p>
<p>If you mean seperating variables to solve differential equations, then yes that is on both.</p>
<p>Are you positive shell method isn't on the AP anymore? That's news to me, and a relief too.</p>
<p>Correct, shell method is not on the exam.</p>
<p>Note however that while shell method is not required on either AB or BC, it may be worthwile (i.e. a lot easier than disk method at some scenarios) to learn.</p>
<p>yea sometimes shell is easier to use on some free response questions....btw will they give me full credit if i were to answer a question using shell method cuz wenever i take a practice exam and look at the scoring guide i never see them grade you if you used shell....</p>
<p>yes, you will receive full credit for shells. they will not penalize correct mathematics.</p>
<p>OK, it's a little late to be asking this now probably but when is the correct time to use disk method and when to use shell method? Or can they be used interchangeably? I thought I had that concept down but after taking a practice test I am confused.</p>
<p>Disk and shell method can be used interchangeably, but each uses a different axis of integration. It just depends on whether the function or its inverse is easier to integrate.</p>
<p>OMG?! Are you serious? I had such a hard time with shell method 2 years ago. =(.</p>
<p>Kyt...owned!</p>
<p>you can use shells but the questions are usually set up so that shells is nearly impossible(but doable) while disks or washers can be easily done.</p>