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06-21-2012, 08:57 PM
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#46 | | Member
Join Date: Jan 2012 Location: NC--> ??? (UNC, Duke, Wake Forest, or Davidson?)
Posts: 336
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^ What do you mean by "work?"
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06-21-2012, 11:05 PM
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#47 | | Junior Member
Join Date: Jan 2011
Posts: 133
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^ work...as in Force * displacement.
I didn't have any work questions on this years BC exam. I still covered it just in case
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06-21-2012, 11:42 PM
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#49 | | Member
Join Date: Jan 2012 Location: NC--> ??? (UNC, Duke, Wake Forest, or Davidson?)
Posts: 336
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^ Haha, humorous are we?
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06-23-2012, 04:14 PM
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#50 | | Member
Join Date: Jun 2010
Posts: 343
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Shell method seems more confusing then disk/washer...
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06-26-2012, 12:12 AM
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#51 | | Member
Join Date: Jan 2012 Location: NC--> ??? (UNC, Duke, Wake Forest, or Davidson?)
Posts: 336
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You will have to tell me how BC online goes! I plan to do the same my senior year.
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06-26-2012, 02:35 PM
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#52 | | Member
Join Date: Jun 2010
Posts: 343
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So taking AB? Yeah, good luck!
Question guys, shell method...why is the p(x) always = to x?
On arc length and surfaces of revolution, is this formula s = c d integral sq rt 1 + {f'(x)}2 dy only used when you have an X= type function...? Same for surfaces of revolution...
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06-26-2012, 02:40 PM
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#53 | | Member
Join Date: Jun 2010
Posts: 343
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I meant {g'(y)}^2
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06-28-2012, 10:36 PM
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#54 | | Member
Join Date: Jan 2012 Location: NC--> ??? (UNC, Duke, Wake Forest, or Davidson?)
Posts: 336
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I have pre calc next year then BC senior year.
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07-03-2012, 01:12 PM
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#55 | | Member
Join Date: Jun 2010
Posts: 343
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Guidelines:
Integration by parts: dv should be most complicated for integration... u is what's left over
u derivative should be simpler than u, dv is what's left over
int sec^3 x dx
dv = sec^2x
u = sec x
for dv, both can be integrated, but, neither is "simpler" when derivative is taken for u. I'm wondering do both guidelines have to be satisfied when choosing dv and u. Should I just memorize what is suggested to be chosen for dv and u like x^2 ex vs a arctanx?
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07-04-2012, 02:49 AM
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#56 | | Member
Join Date: Jan 2012 Location: NC--> ??? (UNC, Duke, Wake Forest, or Davidson?)
Posts: 336
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I didn't understand one bit of that.... Looks like I have a lot of work to do from Pre Calc to AP Calc
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07-05-2012, 11:21 PM
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#57 | | Member
Join Date: Jun 2010
Posts: 343
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You'll do fine. Take it one step at a time.
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07-13-2012, 11:26 PM
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#58 | | Member
Join Date: Jun 2010
Posts: 343
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For trig substitution, can it be applied to integrals that can be solved using u substitution, arctan, etc...? like you get int (d theta) sometimes?
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