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LeftyBurnz
Mr. I Eat Butthole



Registered: 06/21/05
Posts: 24,570
Loc: FL
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lmao. what year were you born anyway?
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Sell Your Soul
Nutmeg shaman



Registered: 03/15/00
Posts: 40,819
Loc: Over there
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The year of disco, man! White collars over jackets all the way.
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Coaster
Baʿal



Registered: 05/22/06
Posts: 33,501
Loc: Deep in the Valley
Last seen: 12 years, 3 months
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this is the best thread ive seen in a while
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Rekkuzo
Lord EmperorButto



Registered: 10/09/07
Posts: 246
Loc: Nor'East
Last seen: 10 years, 11 months
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Re: Math help. [Re: Coaster]
#7910573 - 01/21/08 04:58 PM (16 years, 11 days ago) |
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Yay, my homework is completed!
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LeftyBurnz
Mr. I Eat Butthole



Registered: 06/21/05
Posts: 24,570
Loc: FL
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Quote:
andyistic said: The year of disco, man! White collars over jackets all the way.
come on man, ill be 23 next month. i dont know what fucking year that is lmao. help a youngin out.
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Sell Your Soul
Nutmeg shaman



Registered: 03/15/00
Posts: 40,819
Loc: Over there
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1977.
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Cepheus
Balance




Registered: 04/19/06
Posts: 8,266
Loc: the space between reality...
Last seen: 1 year, 1 month
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Re: Math help. [Re: Coaster]
#7910615 - 01/21/08 05:05 PM (16 years, 11 days ago) |
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Coaster, wtf am I missing here. You're some sort of maths guru. Its actually bugging me now.
-------------------- "I only ever hope to reach equilibrium, in Nature's matrix, in line with the meridian" ~ Jehst
"...and I know that I have to keep breathing, as tomorrow the sun will rise, who knows what the tide will bring?" Free Spore Ring Europe Send any spare spore prints you might have and help the distribution
Open Source. Freedom. GNU/Linux Addicting is not a word.
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DieCommie


Registered: 12/11/03
Posts: 29,258
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High school kids can do logarithms sometimes.
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LeftyBurnz
Mr. I Eat Butthole



Registered: 06/21/05
Posts: 24,570
Loc: FL
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Quote:
andyistic said: 1977.
do you have aim? if so, pm me your s/n.
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LeftyBurnz
Mr. I Eat Butthole



Registered: 06/21/05
Posts: 24,570
Loc: FL
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Quote:
DieCommie said: High school kids can do logarithms sometimes.
yeah im sure they do that shit in AP and whatnot. i wouldnt know though. i was never L33t enough for that. i took liberal arts math. haha. i know. call me retarded. whatever.
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Rekkuzo
Lord EmperorButto



Registered: 10/09/07
Posts: 246
Loc: Nor'East
Last seen: 10 years, 11 months
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Re: Math help. [Re: Cepheus]
#7910694 - 01/21/08 05:23 PM (16 years, 11 days ago) |
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Quote:
Cepheus said: e^2x - e^x = 6.
log both sides:
ln(2x) - ln(x) = 6
using the laws of logs: ln(2x/x) = 6
and as andyistic said:
ln(x) = 6 x = e^6.
When you take the natural log of both sides you'd get: ln(e^2x - e^x) = ln(6) The function doesn't distribute as if it were a constant or a variable.
That's why I had to go back to algebra to solve the main part of the problem, which gave me:
z^2 - z - 6 = 0
BLAH QUADRATIC!!!
z = 3 or -2 and since z = e^x, x = ln(z); domain of ln(z) is z > 0, meaning ln(3) is the only correct answer.
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DieCommie


Registered: 12/11/03
Posts: 29,258
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Re: Math help. [Re: Rekkuzo]
#7910741 - 01/21/08 05:33 PM (16 years, 11 days ago) |
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also ln(2x/x) = 6 does not reduce to ln(x) = 6. It reduces to ln(2) = 6 which is of course not right.
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Jeebies


Registered: 01/23/07
Posts: 1,118
Loc: Transgenic corn&beans, USA
Last seen: 9 years, 8 months
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Re: Math help. [Re: Rekkuzo]
#7910761 - 01/21/08 05:36 PM (16 years, 11 days ago) |
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He's right, ln(3) is the only correct answer.
I could do logarithms when I was a junior in high school. I guess I just took tougher classes, but it seemed like good stuff to know.
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Cepheus
Balance




Registered: 04/19/06
Posts: 8,266
Loc: the space between reality...
Last seen: 1 year, 1 month
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Re: Math help. [Re: Rekkuzo]
#7910768 - 01/21/08 05:38 PM (16 years, 11 days ago) |
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unless there is brackets (e^2x - e^x) I don't see why you can't:
e^2x = 6 + e^x
2x = ln(6) + x
x = ln(6)
Fuck knows. I'm still consolidating my learning.. so please correct me wherever its needed.
-------------------- "I only ever hope to reach equilibrium, in Nature's matrix, in line with the meridian" ~ Jehst
"...and I know that I have to keep breathing, as tomorrow the sun will rise, who knows what the tide will bring?" Free Spore Ring Europe Send any spare spore prints you might have and help the distribution
Open Source. Freedom. GNU/Linux Addicting is not a word.
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Sell Your Soul
Nutmeg shaman



Registered: 03/15/00
Posts: 40,819
Loc: Over there
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Re: Math help. [Re: Cepheus]
#7910774 - 01/21/08 05:39 PM (16 years, 11 days ago) |
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Cepheus: You need to understand this:
log (a+b) does NOT equal log(a) + log(b)
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Liquidkick
H2O
Registered: 05/03/02
Posts: 2,635
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Re: Math help. [Re: Rekkuzo]
#7911131 - 01/21/08 06:36 PM (16 years, 11 days ago) |
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Wow. Totally thought you need to use Calc.
Its been so long since i have taken any math. Totally didn't even realize to use logs.
Sigh...
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learningtofly
Ancient Aliens



Registered: 05/21/07
Posts: 15,105
Loc: Out of this world
Last seen: 12 years, 5 months
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Dude this is algebra 2 tops.
OP if you are still confused, look in your text book for practice problems or formulas, they should help immensely.
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Edited by learningtofly (01/21/08 07:02 PM)
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Rekkuzo
Lord EmperorButto



Registered: 10/09/07
Posts: 246
Loc: Nor'East
Last seen: 10 years, 11 months
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OP here, I'm not confused anymore; just more people are, lol.
Andyistic helped me w/ his first post.
And you're right, this is pretty much algebra. Initially, I just completely forgot to apply it to the problem, because I hadn't been in school for 2 years, but now I remember.
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Coaster
Baʿal



Registered: 05/22/06
Posts: 33,501
Loc: Deep in the Valley
Last seen: 12 years, 3 months
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Re: Math help. [Re: Cepheus]
#7911687 - 01/21/08 07:56 PM (16 years, 11 days ago) |
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Quote:
Cepheus said: Coaster, wtf am I missing here. You're some sort of maths guru. Its actually bugging me now.
y yes i am
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Rekkuzo
Lord EmperorButto



Registered: 10/09/07
Posts: 246
Loc: Nor'East
Last seen: 10 years, 11 months
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Re: Math help. [Re: Coaster]
#7911852 - 01/21/08 08:21 PM (16 years, 11 days ago) |
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We should make this an official math help thread.
Officially.
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