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Author Topic: Cobby's Methods Questions  (Read 40773 times)  Share 

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cobby

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Re: Cobby's Methods Questions
« Reply #150 on: July 02, 2009, 04:33:07 pm »
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Quote from: kurrymuncher on July 02, 2009, 04:32:06 pm
Or press 2nd and then 5, which goes to the math menu, then scroll down to Trig.
Oh haha!

Totally forgot about that menu ..thanks!!!
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TrueTears

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Re: Cobby's Methods Questions
« Reply #151 on: July 02, 2009, 04:34:04 pm »
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type this in your TI-89



see what you get.
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kurrymuncher

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Re: Cobby's Methods Questions
« Reply #152 on: July 02, 2009, 04:35:03 pm »
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infinity? lol
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Over9000

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Re: Cobby's Methods Questions
« Reply #153 on: July 02, 2009, 04:36:31 pm »
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Quote from: TrueTears on July 02, 2009, 04:34:04 pm
type this in your TI-89



see what you get.
Thats interesting, you get infinity, yet when you type (1/0) X (1/0), you get back to undef, lol.
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cobby

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Re: Cobby's Methods Questions
« Reply #154 on: July 02, 2009, 04:38:43 pm »
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Quote from: TrueTears on July 02, 2009, 04:34:04 pm
type this in your TI-89



see what you get.
haha cool :P

how do you get the plus/minus sign on the ti-89?
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TrueTears

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Re: Cobby's Methods Questions
« Reply #155 on: July 02, 2009, 04:39:29 pm »
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or 2ND "+"  -> 2 -> find in there.
« Last Edit: July 02, 2009, 04:41:03 pm by TrueTears »
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cobby

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Re: Cobby's Methods Questions
« Reply #156 on: July 02, 2009, 04:42:44 pm »
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Quote from: TrueTears on July 02, 2009, 04:39:29 pm


or 2ND "+"  -> 2 -> find in there.
woo got it :P
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cobby

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Re: Cobby's Methods Questions
« Reply #157 on: July 16, 2009, 08:15:01 pm »
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Hey guys


How do i find the integral of

The book doesn't have any examples of this form of equation (N)

Thanks guys
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TrueTears

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Re: Cobby's Methods Questions
« Reply #158 on: July 16, 2009, 08:15:42 pm »
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Try long division first.



That should be clearly. no?
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cobby

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Re: Cobby's Methods Questions
« Reply #159 on: July 16, 2009, 08:41:35 pm »
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Quote from: TrueTears on July 16, 2009, 08:15:42 pm
Try long division first.



That should be clearly. no?
sweet, got it

thanks man :)
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cobby

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Re: Cobby's Methods Questions
« Reply #160 on: July 26, 2009, 07:10:11 pm »
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Hey guys,

Im having trouble with part e of the attached question, can someone please help me? :)


I found that the L.E.P estimate = 1650 and the R.E.P estimate = 1650


But part e asks for two values and i only have one? :S :S

Thanks :)

EDIT: Got it guys, made a silly error with the r.e.p estimate.

EDIT TAKE TWO: I dont got it :(  i thought it did, but i still end up with 1650 for both estimates :(

My working out

L.E.P
(0*10)+(9*10)+(16*10)+(21*10)+(24*10)+(25*10)+(24*10)+(21*10)+(16*10)+(9*10)+(0*10)
= 0 + 90 + 160 + 210 + 240 + 250 + 240 + 210 + 160 + 90 + 0
= 1650


R.E.P
 (9*10)+(16*10)+(21*10)+(24*10)+(25*10)+(24*10)+(21*10)+(16*10)+(9*10)
= 90 + 160 + 210 + 240 + 250 + 240 + 210 + 160 + 90
= 1650
 :S


« Last Edit: July 26, 2009, 09:05:43 pm by cobby »
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TrueTears

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Re: Cobby's Methods Questions
« Reply #161 on: July 26, 2009, 10:11:56 pm »
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For c) I got (which is what we expect because it's an overestimate)

d) (which is what we expect because it's an underestimate)

so let the real value be

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cobby

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Re: Cobby's Methods Questions
« Reply #162 on: July 26, 2009, 11:05:41 pm »
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Quote from: TrueTears on July 26, 2009, 10:11:56 pm
For c) I got (which is what we expect because it's an overestimate)

d) (which is what we expect because it's an underestimate)

so let the real value be


Sorry TT...that can't be right as when i find the exact area of the curve i get
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TrueTears

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Re: Cobby's Methods Questions
« Reply #163 on: July 26, 2009, 11:08:06 pm »
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True.
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Re: Cobby's Methods Questions
« Reply #164 on: July 26, 2009, 11:53:17 pm »
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Area 1 =

But the graph is an even function, i.e.

So Area 1 =

And Area 2 =

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