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September 25, 2025, 09:11:04 pm
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Author Topic: TyErd's questions  (Read 42421 times)  Share 

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superflya

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Re: TyErd's questions
« Reply #165 on: May 03, 2010, 07:24:17 pm »
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first option.

x= -x' y= y'

sub em in.
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TyErd

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Re: TyErd's questions
« Reply #166 on: May 03, 2010, 07:34:18 pm »
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okay i get it! i had to draw the graph to completely understand.
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Potter

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Re: TyErd's questions
« Reply #167 on: May 03, 2010, 07:38:08 pm »
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Thanks buddy. That clears up a lot. I was thinking the same.

Also, one more.. I'm kinda curious(not sure if it's true)

If you have a limit, can you dy/dx the numerator and denominator then sub in the limit value

say for like (x+3)(x-2)/x-2 lim-->2

dy/dx the numerator 2x +1
dy/dx the denominator = 1

(2x+1)/1 = 2x +1

sub in 2 = 5

If you do it the textbook way you get the same answer. I asked my teacher and he said it was just coincidence? But I did it with a couple of other questions and got the right answer.
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m@tty

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Re: TyErd's questions
« Reply #168 on: May 03, 2010, 07:44:08 pm »
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That is indeed true, it is called L'hospital's rule. link.
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TyErd

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Re: TyErd's questions
« Reply #169 on: May 03, 2010, 07:46:11 pm »
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Consider the function .

f'(x) may be written as

Find values a,b and c.
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superflya

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Re: TyErd's questions
« Reply #170 on: May 03, 2010, 07:50:03 pm »
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same as

chain rule.

a=3 b=4 c=2
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TyErd

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Re: TyErd's questions
« Reply #171 on: May 03, 2010, 08:08:12 pm »
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got it, thanks superflya!
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TyErd

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Re: TyErd's questions
« Reply #172 on: May 03, 2010, 08:25:59 pm »
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Differentiating exponential functions the fastest and easiest way?
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m@tty

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Re: TyErd's questions
« Reply #173 on: May 03, 2010, 08:31:25 pm »
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Example?

For

...
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Blakhitman

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Re: TyErd's questions
« Reply #174 on: May 03, 2010, 08:32:58 pm »
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Quote from: TyErd on May 03, 2010, 08:25:59 pm
Differentiating exponential functions the fastest and easiest way?

lol reminds me of a post where I was laughed at :D

m@tty might remember :P
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TyErd

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Re: TyErd's questions
« Reply #175 on: May 03, 2010, 08:38:38 pm »
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why were you laughed at?
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superflya

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Re: TyErd's questions
« Reply #176 on: May 03, 2010, 08:41:54 pm »
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maybe cause when u differentiate e^x it stays the same. im just guessing :P
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TyErd

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Re: TyErd's questions
« Reply #177 on: May 03, 2010, 08:43:07 pm »
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Quote from: superflya on May 03, 2010, 08:41:54 pm
maybe cause when u differentiate e^x it stays the same. im just guessing :P

it does?
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Blakhitman

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Re: TyErd's questions
« Reply #178 on: May 03, 2010, 08:43:16 pm »
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Here comes the main offender ^ :P (superflya)
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superflya

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Re: TyErd's questions
« Reply #179 on: May 03, 2010, 08:44:16 pm »
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lulz ahahah \head-desk
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"The day i stop learning, is the day i walk away from the game" Michael Jordan.
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