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View Full Version : OT: this is a sad day



Maj_Death
09-13-2004, 02:02 AM
Well maybe not but I have a bit of a problem that is a little depressing, I forgot how to manipulate logarithms http://ubbxforums.ubi.com/images/smiley/16x16_smiley-sad.gif. I am a math person and I remember many semesters ago how easy they were, but that was many semesters ago and I don't use them often so I forgot how to do it. Anyways after a nice beutiful page of calculus stuff I ended up with the following and can't go any further:

ln|y| - ln|x| = -1/x + 1 + c

I don't have the slightest clue as to how to express that in exponential form. Anyone here care to enlighten me? I don't really need to know for the course I'm taking, but it would be nice to know regardless.

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Spelling mistakes left in intentionally to annoy tttiger.

Maj_Death here, I/JG1_Death at HL

I build COOPs and DF maps. If you would like some of them you can get them atmy COOP page (http://www14.brinkster.com/triggerhappy770/default.htm)

I/JG1 Oesau is recruiting axis pilots who prefer to fly maximum realism. We accept both veterans and rookies. We fly in VEF2, VWF and may join other online wars in the future. I am currently the acting CO, if you are interested in joining please PM me here or page me in HL.
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Maj_Death
09-13-2004, 02:02 AM
Well maybe not but I have a bit of a problem that is a little depressing, I forgot how to manipulate logarithms http://ubbxforums.ubi.com/images/smiley/16x16_smiley-sad.gif. I am a math person and I remember many semesters ago how easy they were, but that was many semesters ago and I don't use them often so I forgot how to do it. Anyways after a nice beutiful page of calculus stuff I ended up with the following and can't go any further:

ln|y| - ln|x| = -1/x + 1 + c

I don't have the slightest clue as to how to express that in exponential form. Anyone here care to enlighten me? I don't really need to know for the course I'm taking, but it would be nice to know regardless.

----------------------------------------------------------------------------
Spelling mistakes left in intentionally to annoy tttiger.

Maj_Death here, I/JG1_Death at HL

I build COOPs and DF maps. If you would like some of them you can get them atmy COOP page (http://www14.brinkster.com/triggerhappy770/default.htm)

I/JG1 Oesau is recruiting axis pilots who prefer to fly maximum realism. We accept both veterans and rookies. We fly in VEF2, VWF and may join other online wars in the future. I am currently the acting CO, if you are interested in joining please PM me here or page me in HL.
http://www.bestanimations.com/Humans/Skulls/Skull-06.gif

Von_Zero
09-13-2004, 02:33 AM
OMG maths!!! go away demon!!! http://ubbxforums.ubi.com/images/smiley/icon_twisted.gif
joking m8
I am sorry but I won't respond to this, for the sole rewason,that there are only two more days left out of this holliday, and i don't wanna think about this too soon http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif
If you wait two more days, i'll be glad to help http://ubbxforums.ubi.com/images/smiley/blink.gif

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RAAF_Edin
09-13-2004, 02:48 AM
Yeah, it's sad alright... I'm in the same boat... used to know all this and now... I'm just about piloting virtual aircraft... well that and doing my job, which has nothing to do with maths http://ubbxforums.ubi.com/images/smiley/16x16_smiley-indifferent.gif

So in simple terms... now I suck http://ubbxforums.ubi.com/images/smiley/16x16_smiley-sad.gif

Well I could refresh my memory and know this stuff again.. but naaaa http://ubbxforums.ubi.com/images/smiley/16x16_smiley-very-happy.gif

--------------------------------------
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Edin "Kuky" Kulelija
No76 Squadron RAAF

Salfordian
09-13-2004, 03:10 AM
by doing the exponential thingy I think it could be expressed like this:
y - x = e^(-1/x) + e^1 + e^c

don't know if this is any help, if not sorry, can't think of anything else

jobace
09-13-2004, 03:15 AM
ln|y| - ln|x| = -1/x + 1 + c
pfff maybe ln|y| - ln|x|+1/x = maddox games
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BBB_Hyperion
09-13-2004, 03:33 AM
ln (y) = z

e^z = y

So what Salfordian wrote .

You need to take both sites ^e .

Then you have.

e^(ln y)-e^(ln x) = e^(1/x) + e^1 + e^c

y - x = root x of e + e^1 + e^c

If i was good in remembering that .)

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Regards,
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Nexus2005
09-13-2004, 03:44 AM
ln|y| - ln|x| = -1/x + 1 + c
ln(|y|/|x|) = -1/x + 1 + c
|y|/|x| = e^(-1/x + 1 + c)

Because log(a) - log(b) = log(a/b) and log to the base a (b) = c is the same as b = a^c

I think that's right, but I've not done any thinking let alone maths in a couple of months http://ubbxforums.ubi.com/images/smiley/blink.gif

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"They can't take the Spitfires Mitch, they can't take them..."

[This message was edited by Nexus2005 on Mon September 13 2004 at 02:56 AM.]

Maple_Tiger
09-13-2004, 05:00 AM
What the!

Capt. 361stMapleTiger.
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Proud member of the FBAA and Nutty Philosohpy Club.
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S 8
09-13-2004, 05:20 AM
1+1=2
What´s more to know http://ubbxforums.ubi.com/images/smiley/16x16_smiley-tongue.gif

LeadSpitter_
09-13-2004, 05:26 AM
2lbs of mcdonalds = 2lbs of ****.

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Cajun76
09-13-2004, 05:27 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by S 8:
1+1=2
What´s more to know http://ubbxforums.ubi.com/images/smiley/16x16_smiley-tongue.gif<HR></BLOCKQUOTE>


I never got that far..... http://ubbxforums.ubi.com/images/smiley/16x16_smiley-sad.gif

Good hunting,
(56th)*Cajun76
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If you have trouble hitting your objective, your secondary targets are here and here,
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JG52Uther
09-13-2004, 05:43 AM
got a headache just looking at this thread http://ubbxforums.ubi.com/images/smiley/35.gif

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MEGILE
09-13-2004, 05:58 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>
ln|y| - ln|x| = -1/x + 1 + c
ln(|y|/|x|) = -1/x + 1 + c
|y|/|x| = e^(-1/x + 1 + c)

Because log(a) - log(b) = log(a/b) and log to the base a (b) = c is the same as b = a^c

<HR></BLOCKQUOTE>

Ahhh so its because a - b = a/b... man why didn't someone tell me that http://ubbxforums.ubi.com/images/smiley/35.gif

Snyde-Dastardly
09-13-2004, 06:09 AM
Stop please,,,,, http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

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carguy_
09-13-2004, 06:33 AM
Hmm seems that math persons have an advantage over scholar type ppl.Vast majority of aces I know are very good at math.

A hidden cheat perhaps?

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Self-proclaimed dedicated Willywhiner since July 2002

Owlsphone
09-13-2004, 08:28 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Megile:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>
ln|y| - ln|x| = -1/x + 1 + c
ln(|y|/|x|) = -1/x + 1 + c
|y|/|x| = e^(-1/x + 1 + c)

Because log(a) - log(b) = log(a/b) and log to the base a (b) = c is the same as b = a^c

<HR></BLOCKQUOTE>

Ahhh so its because a - b = a/b... man why didn't someone tell me that http://ubbxforums.ubi.com/images/smiley/35.gif<HR></BLOCKQUOTE>

And a + b = a x b...

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Vertically challenged since 1984.

mcTOPGUNs
09-13-2004, 08:50 AM
http://ubbxforums.ubi.com/infopop/emoticons/icon_eek.gif :eek http://ubbxforums.ubi.com/infopop/emoticons/icon_eek.gif :

Im with S 8
All ya need to know is 1+1+2 - easy.

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BSS_Goat
09-13-2004, 10:41 AM
UUUUGHGGGGHH my brain exploded.

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CHDT
09-13-2004, 10:43 AM
vade retro mathematicas!

crazyivan1970
09-13-2004, 11:03 AM
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V!
Regards,

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56th BMAC
09-13-2004, 11:06 AM
http://ubbxforums.ubi.com/images/smiley/blink.gif Uuuummmmmmmmmmmmmmm http://ubbxforums.ubi.com/images/smiley/blink.gif

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Mike8686
09-13-2004, 11:49 AM
OMG MATH http://ubbxforums.ubi.com/images/smiley/heart.gif
ln|y| - ln|x| = -1/x + 1 + c

Well log[a]-log[b]=log[a/b] soo

ln[y/x]= -1/x + 1 + c

Well ln[a]=LOG(e)[A] so e^ln[a]=a right? soo
if we *e* the whole expression we get rid of the *ln* and have the other side in exponential form http://ubbxforums.ubi.com/images/smiley/sonar.gif

e^(ln[y/x])=e^(-1/x + 1 + c) sooo

y/x=e^(-1/x + 1 + c)

and thats that for ur exponential expression. Now for fun u can differentiate or better yet integrate it!

Next time post a Physics problem http://ubbxforums.ubi.com/images/smiley/heart.gif http://ubbxforums.ubi.com/images/smiley/11.gif

Nexus2005
09-13-2004, 03:37 PM
That's what I did already mike http://ubbxforums.ubi.com/images/smiley/mockface.gif

http://www.bobcs.co.uk/sig/Nexussig/sig2.jpg (http://www.bobcs.co.uk)
"They can't take the Spitfires Mitch, they can't take them..."

bazzaah2
09-13-2004, 04:15 PM
lol, some brains here are definitely overmodelled.

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Mike8686
09-13-2004, 04:20 PM
o i c, I didnt read ur post, deaths post got me too excited, i just replied, lol

Dolemite-
09-13-2004, 04:20 PM
Wait a minute, you guys do math for fun?! http://ubbxforums.ubi.com/infopop/emoticons/icon_eek.gif http://ubbxforums.ubi.com/images/smiley/88.gif

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Maj_Death
09-13-2004, 04:25 PM
Thank you Nexus for the most understandable answer. Mike did an ok job too. Ok now to see if my answer equal's the one in the back of the book.

----------------------------------------------------------------------------
Spelling mistakes left in intentionally to annoy tttiger.

Maj_Death here, I/JG1_Death at HL

I build COOPs and DF maps. If you would like some of them you can get them atmy COOP page (http://www14.brinkster.com/triggerhappy770/default.htm)

I/JG1 Oesau is recruiting axis pilots who prefer to fly maximum realism. We accept both veterans and rookies. We fly in VEF2, VWF and may join other online wars in the future. I am currently the acting CO, if you are interested in joining please PM me here or page me in HL.
http://www.bestanimations.com/Humans/Skulls/Skull-06.gif

Maj_Death
09-13-2004, 04:33 PM
Nuts, it isn't. Damn it now I have to spend the next 30-40 minutes trying to figure out what I did wrong or start over http://ubbxforums.ubi.com/images/smiley/16x16_smiley-mad.gif. BTW mike, that ugly equation is what I ended up with after I integrated the stupid thing.

Edit 30 minutes later: Well it wasn't as screwed up as I thought. It was totally wrong because I screwed up the initial integration but it turned out to be a simple fix. Problem solved and I now remember atleast 2 of the log rules thanks to the people here.http://ubbxforums.ubi.com/images/smiley/16x16_smiley-happy.gif

Note to self, next time try to foil before using integration by parts http://ubbxforums.ubi.com/images/smiley/35.gif.

----------------------------------------------------------------------------
Spelling mistakes left in intentionally to annoy tttiger.

Maj_Death here, I/JG1_Death at HL

I build COOPs and DF maps. If you would like some of them you can get them atmy COOP page (http://www14.brinkster.com/triggerhappy770/default.htm)

I/JG1 Oesau is recruiting axis pilots who prefer to fly maximum realism. We accept both veterans and rookies. We fly in VEF2, VWF and may join other online wars in the future. I am currently the acting CO, if you are interested in joining please PM me here or page me in HL.
http://www.bestanimations.com/Humans/Skulls/Skull-06.gif

[This message was edited by Maj_Death on Mon September 13 2004 at 04:00 PM.]

Mike8686
09-13-2004, 05:17 PM
Ahhh, math is a fickle thing, you're either perfect or you're totally wrong, no ifs ands or buts. I know how u feel tho Death, I've had my fair share of those where u could simplify the problem from the beginning and u dont so u end up doing a more complicated (and often wrong) problem, lol. U work a problem in a seemingly perfect manner only to find urself wrong and realize after busting ur brain for an hour that an almost negligibly small mistake at the beginning screwed it all up! When u realize ur mistake ur like http://ubbxforums.ubi.com/infopop/emoticons/icon_redface.gif then u look at the time and ur like http://ubbxforums.ubi.com/images/smiley/52.gif and then u think how much more sleep u'd be getting if u decided to learn everything b4 the day b4 the Xam and then ur like http://ubbxforums.ubi.com/images/smiley/51.gif. At least thats how it is for me, I never learn my lesson tho http://ubbxforums.ubi.com/images/smiley/35.gif

Ur taking Cal2 right?

FZG_Mined
09-13-2004, 05:22 PM
well...when i'm unable to make my math i just stop, have a beer, and then begin again, and i always get to the solution ;-)

Davide

ps. goooood luck!!

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Mackane1
09-13-2004, 05:32 PM
In the immortal words of LOU COSTELLO...

"Seven goes into twenty-eight, thirteen times"

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ImpStarDuece
09-13-2004, 06:14 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by LeadSpitter_:
2lbs of mcdonalds = 2lbs of ****.

<HR></BLOCKQUOTE>
Resteraunt mathematics

2lbs of McDonalds= 2 weeks of exercise and 2 months off your life span. http://ubbxforums.ubi.com/infopop/emoticons/icon_confused.gif

ImpStarDuece,

Flying Bullet Magnet... Catching Lead Since 2002

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- Carl von Clauswitz (1827)

MADMANofMOH
09-13-2004, 06:38 PM
i need a drink and a nap....

steel_blue_eagle
09-14-2004, 12:05 AM
owl is right

and remember that e(a + b + c) = e(a)*e(b)*e(c)

Nexus2005
09-14-2004, 06:34 AM
lol, ul Death. I've had that happen to me many many times, it seriously dents your will to live when you realise how much time and paper you've wasted and that you now have to do it all over again http://ubbxforums.ubi.com/images/smiley/52.gif

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"They can't take the Spitfires Mitch, they can't take them..."

DuxCorvan
09-14-2004, 10:09 AM
I try not to force my upper head. It makes the other one feel sad and watch the ground. http://ubbxforums.ubi.com/infopop/emoticons/icon_rolleyes.gif