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tru bass
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United Kingdom
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 Posted - 2009/02/15 : 12:20:44
Now this is a long shot..
im stuck on a problem in some maths work im doing for my a-level..
6. Find the maximum point of the differentiation curve y = x^3 + px^2 + q when the minimum point is (4,-11).
all i know is that the dy/dx = 3x^2 + 2px
should i use the quadratic equation? (-b +/- sqr b^2 - 4ac)/2a?
and yes this is a real question..
if someone could help i would be very happy !
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Vitalism
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Canada
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Posted - 2009/02/15 : 17:54:45
happyhardcore.com is not a good place to ask this.
don't you have a math tutor or someone you can see at your school?
i can do this shit if i tried, but i loaaaathe math.
i'd rather just pay some asian to do it for me (in regards to any math i'll have to do, financially, in the future)
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tru bass
Advanced Member
United Kingdom
1,996 posts
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Posted - 2009/02/15 : 17:59:40
quote:
Originally posted by Vitalism:
happyhardcore.com is not a good place to ask this.
don't you have a math tutor or someone you can see at your school?
i can do this shit if i tried, but i loaaaathe math.
i'd rather just pay some asian to do it for me (in regards to any math i'll have to do, financially, in the future)
yeah it was just a wild effort..
and no, i cant get someone to see it because its the half term :s
i think i will just have to ask everyone i know instead :D
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Rayovac
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United States
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Posted - 2009/02/15 : 20:05:41
I'm going to assume that hopefully that's some college level math...
And yeah, you might want to ask elsewhere. :s
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Lilley
Advanced Member
Australia
3,740 posts
Joined: Jul, 2006
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Posted - 2009/02/17 : 09:14:47
quote:
Originally posted by tru bass:
Now this is a long shot..
im stuck on a problem in some maths work im doing for my a-level..
6. Find the maximum point of the differentiation curve y = x^3 + px^2 + q when the minimum point is (4,-11).
all i know is that the dy/dx = 3x^2 + 2px
should i use the quadratic equation? (-b +/- sqr b^2 - 4ac)/2a?
and yes this is a real question..
if someone could help i would be very happy !
ok. i havnt done maths in over a year.
im not sure what it means by differentiation curve.
however, run dy/dx through quadratic equation. If you get four as one of your results (if my thinking is correct it should be the largest result), hopefully we are on the right track. sub in 4 as x into your dy/dx equation, and find p, then find q. then sub the other value of x (from the quadratic) into your main equation to give the y of the point.
at Rayovac: Its pretty standard maths, nothing really special. In Aus would probably be year 11 question
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nearly in line....
.....strange continuity problems
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Edited by - Lilley on 2009/02/17 09:16:46 |
silver
Admin
Japan
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Joined: Feb, 2001
894 hardcore releases
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Posted - 2009/02/17 : 10:00:06
http://www.analyzemath.com/Calculators/QuadraticFunctionCal.html
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Meathead
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United Kingdom
4,217 posts
Joined: Sep, 2006
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Posted - 2009/02/17 : 12:07:45
What level maths is this? Im (re)doing my GCSEs  and were doing something similar at the minute but christ this is on a whole new level that i never wanna go into.
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Jax
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United Kingdom
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Joined: Apr, 2005
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Posted - 2009/02/17 : 13:08:54
a level
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Meathead
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United Kingdom
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Posted - 2009/02/17 : 13:52:06
quote:
Originally posted by Jax:
a level
Ah cheers, thank god ill never have to do it!  it all looks like total bollocks to me.
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"Music creates order out of chaos; for rhythm imposes unanimity upon the divergent, melody imposes continuity upon the disjointed, and harmony imposes compatibility upon the incongruous." -Sir Yehudi Menuhin
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Jax
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United Kingdom
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Posted - 2009/02/17 : 15:35:37
quote:
Originally posted by Meathead:
quote:
Originally posted by Jax:
a level
Ah cheers, thank god ill never have to do it! it all looks like total bollocks to me.
It would be a lot easier for you to comprehend if you had a teacher go over it with you, just one of them things that looks like a foreign language if you have never delt with it before lol
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tru bass
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United Kingdom
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Posted - 2009/02/17 : 20:17:46
thats pretty helpful you lot ;) cheers!
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DJ-Intensity
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United States
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Joined: Mar, 2008
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Posted - 2009/02/17 : 21:31:52
Maths is my weakest subject.
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DJ Intensity.
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Meph751
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United States
1,488 posts
Joined: Dec, 2005
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Posted - 2009/02/17 : 23:22:07
quote:
Originally posted by DJ-Intensity:
Maths is my weakest subject.
WE CARE
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Edited by - Meph751 on 2009/02/17 23:59:22 |
Rayovac
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United States
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Joined: Jan, 2008
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Posted - 2009/02/17 : 23:53:40
quote:
Originally posted by DJ-Intensity:
Maths is my weakest subject.
Same here, even worse than physics for me.
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Lilley
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Australia
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Posted - 2009/02/18 : 04:59:54
dont know how they criteria levels over there, but this is really quite a simple question (i think - assuming the answer i gave was right). its (easy) calculus with some graphing thrown in. as i said, a standard year 11 (out of 12) question.
physics is my best subject, followed by maths.
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nearly in line....
.....strange continuity problems
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tru bass
Advanced Member
United Kingdom
1,996 posts
Joined: Jul, 2006
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Posted - 2009/02/18 : 11:38:02
quote:
Originally posted by Lilley:
dont know how they criteria levels over there, but this is really quite a simple question (i think - assuming the answer i gave was right). its (easy) calculus with some graphing thrown in. as i said, a standard year 11 (out of 12) question.
physics is my best subject, followed by maths.
im doing a-levels which is year 12.
we touched on it last year but nowhere near in as much depth as now..
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