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05-05-2009, 12:52 PM
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#46 | | Junior Member
Join Date: Jan 2009
Posts: 57
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That's weird I do a lot better on questions that can be done without a calculator (I hate having to graph things and find intersect, I make mistakes with these problems)
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05-05-2009, 01:13 PM
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#47 | | Senior Member
Join Date: Oct 2008 Location: PA-->NYU 2013!!!!
Posts: 1,152
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^me too! now why is that? haha I guess they're just easier?
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05-05-2009, 02:49 PM
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#48 | | Member
Join Date: Jun 2007 Location: UCSD
Posts: 473
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Exam is tomorrow! I think I'm fairly ready (got 90% on a practice exam), but I'm worried that I'll blank out.
If anyone's on now, let's study together (AIM chatroom): CCAPCALCREVIEW
For both AB and BC.
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05-05-2009, 02:57 PM
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#49 | | Junior Member
Join Date: Jan 2009
Posts: 57
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I'm up for it
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05-05-2009, 03:01 PM
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#50 | | Junior Member
Join Date: Aug 2008
Posts: 93
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On open ended, do I have to justify if a minimum is indeed a minimum, and not only a critical point, or would I be safe to assume that the critical point I solve for on optimization problems is the one desired? In other words, should I show that I'm plugging in test points to verify that the sign does change in the right way?
Also, what do they prefer, the second derivative test or plugging in test points?
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05-05-2009, 04:31 PM
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#51 | | Member
Join Date: Aug 2008
Posts: 396
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chatroom for calc studying? i'm in. please invite me! user: jennieblue22 on aim, thanks
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05-05-2009, 04:35 PM
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#52 | | Senior Member
Join Date: Mar 2008
Posts: 2,335
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@ smash20 - I'm not 100% sure, but if you are asked to find a minimum, you are usually expected to justify. I haven't seen questions asking to "justify a minimum" though; it's moreso "find the critical point/value at x" and explain whether it's an abs max, abs min, or neither, or something like that.
I think they like the 2nd derivative test, because if you make a sign chart, you have to expressly label what it is and what you are doing, so 2nd deriv. test is faster. For abs. min/max, though, be sure to test the end points.
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05-05-2009, 04:59 PM
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#53 | | Member
Join Date: Oct 2008
Posts: 304
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I'm very confused about something very stupid... Whats the difference between convergence and divergence? How much percent of the exam is sequences are series?
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05-05-2009, 05:07 PM
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#54 | | Senior Member
Join Date: Mar 2008
Posts: 2,335
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A series converges if the sum of its terms "add up" to a number. For all geometric series of the form aR1....aR^2...aR^n, the series converges to A / (1-r) if abs(r) < 1.
Divergence is where a series doesn't converge to anything. 1/n is such a series.
In addition, conditional convergence or a radius of convergence is when a series doesn't converge fully, but it converges within a certain radius. The ratio test is most commonly used to find the radius of convergence.
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05-05-2009, 05:11 PM
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#55 | | Junior Member
Join Date: Apr 2009 Location: Canada
Posts: 258
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PLEASE HELP!!! I do not know when to use the Cylindrical Shell method and when not to when finding the volume of revolution??? Why do we even need it anyway?? :S My teachers didn't know how to explain it to me,,,so,,,lol,,,help?
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05-05-2009, 05:14 PM
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#56 | | Junior Member
Join Date: Jun 2008
Posts: 40
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Are there 4 different packets on the test (MC non-calc, MC calc, FR calc, FR non-calc)? Or are they all in one booklet? If it was like that, wouldn't people cheat?
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05-05-2009, 05:14 PM
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#57 | | Senior Member
Join Date: Oct 2007
Posts: 1,217
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Generally, if you revolve around the y axis you use shells and around the x axis you use slices (assuming you are integrating with respect to x, it is the opposite if it is with respect to y).
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05-05-2009, 05:17 PM
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#58 | | Junior Member
Join Date: Jun 2008
Posts: 40
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Are there 4 different packets on the test (MC non-calc, MC calc, FR calc, FR non-calc)? Or are they all in one booklet? If it was like that, wouldn't people cheat??
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05-05-2009, 05:17 PM
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#59 | | New Member
Join Date: Mar 2009
Posts: 20
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Are decimal approximations (to 4+ decimal places or so) always acceptable as a replacement for actual values?
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05-05-2009, 05:25 PM
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#60 | | Junior Member
Join Date: May 2009
Posts: 48
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I am the administrator for tech-shep.com, I made the AP Calc exam calculator. Is there anything you would like me to add to the calculator?
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