| | |  | | 
05-09-2008, 05:06 PM
|
#46 | | Member
Join Date: Jul 2006
Threads: 61
Posts: 579
| Isn't 2d asking for L''(5.5)? How the rate of people in the line was changing? Essentially, how L'(5.5) was changing so it will be in people/hrs^2 | 
| | |
05-09-2008, 05:09 PM
|
#47 | | New Member
Join Date: Feb 2008
Threads: 1
Posts: 22
| If on 2(b) I found the total instead of the average (forgot to divide by 4) will I only lose one point?
I am so STUPID
and how much are 4(a) and (b) worth? I forgot to start at -2.
UGH
Last edited by Alex7592 : 05-09-2008 at 05:16 PM.
| |
| | |
05-09-2008, 05:30 PM
|
#48 | | Member
Join Date: Jul 2006
Threads: 61
Posts: 579
| We all make silly mistakes. You should get a 5 if you did well on the MC and most of the FR.  | |
| | |
05-09-2008, 05:36 PM
|
#49 | | New Member
Join Date: Feb 2008
Threads: 1
Posts: 22
| Can someone estimate what I got? lol
-Didn't divide by 4 on 2(b)
-Didn't start at -2 on 4(a), 4(b)
-Missed 6(d)
-Think I missed 5(c)
-On 1(b) I think I accidentally evaluated (does this matter? lol)
So I missed 2(b), 4(a), 4(b), 6(d), 5(c)
and I think I got the rest...
On the MC I was sort of confident and only skipped 3 total.
Last edited by Alex7592 : 05-09-2008 at 05:53 PM.
| |
| | |
05-09-2008, 05:54 PM
|
#50 | | New Member
Join Date: May 2008
Threads: 0
Posts: 3
| I keep doing the math over and over again to find the second derivative of past 6c, but it NEVER comes out right. Maybe one of you can point out my foolishness (luckily, its the only mistake I made all test).
For simplicity, yd=first derivative, ydd=second derivative
yd=-2 (that I know for fact...at least I hope so)=3y/4-y^2/8
ydd=3yd/4 - 2y*yd/8 = 3*(-2)/4 - 2*8*(-2)/8=-3/2 + 4 = 5/2
The answer however, when I integrate and then differentiate is 1/2.
Besides some stupidity I just can't see yet, thought it was an amazing test. | 
| | |
05-09-2008, 06:03 PM
|
#51 | | Junior Member
Join Date: May 2008
Threads: 1
Posts: 73
| Quote: |
for the eulers one i accidently forgot to multiply by delta x for the 2nd term and I did for the first but not the second...but my work showed the euqation with delta x
| I'm afraid Euler's method usually is graded with 1 point for doing two correct steps and 1 point for the actual answer. Quote: |
and also for the trapeziodal..i forgot to divide by 4
| It depends on how the points are distributed, but it is probably only -1/ Quote: |
and for the slope feild i forgot to include the range above six but i did include 0 to 6
| Probably -1.
how many point would i lose for each circumstance | |
| | |
05-09-2008, 07:16 PM
|
#52 | | New Member
Join Date: May 2008
Threads: 0
Posts: 1
| How is Euler's method graded? My teacher taught us to do a table...
My table included x| y | dy/dt and on the side, a formula y(new) = y(old) + (dy/dt)(h), where h = .5
I also arrived at 6.56 or 105/16 | |
| | |
05-09-2008, 07:17 PM
|
#53 | | Junior Member
Join Date: Dec 2007
Threads: 26
Posts: 147
| ^your answer is correct  you should be fine! | |
| | |
05-09-2008, 07:32 PM
|
#54 | | Member
Join Date: Apr 2006
Threads: 37
Posts: 549
| Screwed up 2c entirely, found f(x) for 5c but didn't plug in f(3), and had (6,8) instead of (6,8].
I'm thinking a 49/54?
*EDIT* I also did not do Lagrange Error Bound, so 47/54... | |
| | |
05-09-2008, 07:56 PM
|
#55 | | Member
Join Date: Mar 2008 Location: Arizona Gender: Male
Threads: 4
Posts: 334
| wow I can't believe I solved the intervals correctly for 5(c) and then decided there was no interval
:S :S oh well I guess that's only -1 then? | |
| | |
05-09-2008, 08:14 PM
|
#56 | | Junior Member
Join Date: Dec 2007
Threads: 26
Posts: 147
| Quote:
lolcats4
wow I can't believe I solved the intervals correctly for 5(c) and then decided there was no interval
:S :S oh well I guess that's only -1 then?
| LOL, I did the same thing... | |
| | |
05-09-2008, 08:28 PM
|
#57 | | New Member
Join Date: May 2008
Threads: 0
Posts: 15
| Being as pessimistic as possible: 7,9,9,9,3,2 = 39. Is that in the 5 range?
Oh and 32ish on the m.c....So 71/108
Last edited by elitespart : 05-09-2008 at 08:37 PM.
| |
| | |
05-09-2008, 08:49 PM
|
#58 | | Member
Join Date: Oct 2007 Gender: Male
Threads: 40
Posts: 571
| for me i think this is reasonable. Not pessimistic but not optimistic
fr 7,7,9,7,7,6-7
Mc 30? | |
| | |
05-09-2008, 09:09 PM
|
#59 | | New Member
Join Date: Apr 2008
Threads: 3
Posts: 8
| if you bsed your explanation, but actually guessed the right answer. that's only -1 right? | |
| | |
05-09-2008, 09:28 PM
|
#60 | | New Member
Join Date: Apr 2008
Threads: 3
Posts: 8
| ^ for the "give a reason for your answer" parts. | |
| | All times are GMT -5. The time now is 05:23 AM. |
College Confidential is dedicated to providing the best free college admissions information available on the Web, through our many articles and this discussion forum. For those of you who wish more personal advising, College Confidential offers private counseling services, conducted via e-mail, with services starting at $89. Counseling is conducted by our Director of Counseling Dave Berry, co-author of America's Elite Colleges and/or with Sally Rubenstone, co-author of Panicked Parents Guide to College Admission, and our other outstanding associates. See College Counseling for more information.
