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☖ Forums → Discussion Forum → feeling incredibly thick
feeling incredibly thick
2008-04-20, 1:52 PM #1
Cna someone break this down into steps so i have a clue whats going on, i just can't seem to get the right answer.

f(x)=-(3/x^4)-ln(x)

f'(x)= 12x^-5-x^-1

thanks for the help its an easy question and one i should be albe to do but can't
2008-04-20, 1:57 PM #2
-(3/x^4) can be written -3(x^-4), the derivative of which by the basic rule is -3(-4x^-5) by multiplying by the exponent and subracting one from that exponent. That simplifies to 12x^-5. And the derivative of lnx is 1/x (also written x^-1), that's something you memorize unless you want to take forever to do a problem.
Warhead[97]
2008-04-20, 1:58 PM #3
(3/x^4) can be re-written as 3(x^-4). Use power rule. Derivative of ln(x) is 1/x which can also be written as (x^-1)

2008-04-20, 1:58 PM #4
Wow, talk about expecting something different from the thread.
SnailIracing:n(500tpostshpereline)pants
-----------------------------@%
2008-04-20, 2:00 PM #5
Originally posted by ECHOMAN:
Wow, talk about expecting something different from the thread.


This?

[http://www.zanyvideos.com/uploads/fat_woman_in_bikinis.jpg]

2008-04-20, 2:00 PM #6
Ta very much. :D
2008-04-20, 2:01 PM #7
thats just sick^^^
2008-04-20, 2:01 PM #8
Ah yeah, it's called the power rule. Well, I'm just glad I actually know some math still.
Warhead[97]
2008-04-20, 2:05 PM #9
hmm, i reallyshould know all this stuff and when i see it remeber soing it many moons ago when i was still in short trousers. however after not taking A level maths meaning i did no maths for 2 years then starting an engineering degree i just seem to have forgot it all. :(
2008-04-20, 2:08 PM #10
Originally posted by BombayZeus:
This?

[http://www.zanyvideos.com/uploads/fat_woman_in_bikinis.jpg]


Looks like they ate mb.
Looks like we're not going down after all, so nevermind.
2008-04-20, 2:18 PM #11
Well between the four of them they ate half of him.
2008-04-20, 2:41 PM #12
Originally posted by ECHOMAN:
Wow, talk about expecting something different from the thread.


Yeah, I'm pretty sure I got a spam e-mail at some point with the same title as this thread.
If you think the waiters are rude, you should see the manager.
2008-04-20, 2:56 PM #13
now can someone explain where this 3 and the 2 in this come from

f(x) = e^3x.Cos(2x)

my answer f'(x) = e^3x.cos(2x)-e^3x.sin(2x)
should be f'(x) = 3 e^3x.cos(2x)- 2 e^3x.sin(2x)
2008-04-20, 3:35 PM #14
ahh im just being a thicko sorted now
2008-04-20, 3:48 PM #15
Chain Rule.

Derivative of e^(3x), is e^(3x) times the derivate of whatever is inside the parenthesis. In this case it is derivative of 3x, which is 3.

Same with the derivative of Cos(2x), which is (-sin(2x))(derivative of 2x).

And this is why I'll never be a math teacher.

2008-04-20, 4:44 PM #16
Originally posted by BombayZeus:
This?

[http://www.zanyvideos.com/uploads/fat_woman_in_bikinis.jpg]

OH GOD I SEE NIPPLE
2008-04-20, 7:28 PM #17
Its just a reflection moron :argh:

2008-04-20, 7:46 PM #18
Related fact: Obese people have to be cooked slowly in the oven at the crematorium. Otherwise, you risk overheating and ruining your crematorium's oven.
2008-04-20, 8:10 PM #19
Originally posted by IRG SithLord:
Related fact: Obese people have to be cooked slowly in the oven at the crematorium. Otherwise, you risk overheating and ruining your crematorium's oven.


I demand statistics.

No really, I do.
SnailIracing:n(500tpostshpereline)pants
-----------------------------@%
2008-04-20, 8:37 PM #20
P.S. excessive quoting of that image makes navigating this thread difficult, bros
2008-04-20, 10:04 PM #21
Originally posted by ECHOMAN:
I demand statistics.

No really, I do.


I don't have the statistics. My dad runs a funeral home and had a crematorium installed. Thats actually part of the training for using it. :p
2008-04-20, 11:03 PM #22
lol, that's funny. Does he charge more for fat people?
"it is time to get a credit card to complete my financial independance" — Tibby, Aug. 2009
2008-04-21, 11:55 AM #23
wow why the fat chicks I mean comon
"Nulla tenaci invia est via"
2008-04-21, 1:23 PM #24
"We're sorry Mrs Johnson but your husband was so fat that he's now wedged in the entrance to our oven. We'd use butter to grease him out but we don't want to risk him coming back as a zombie."
nope.
2008-04-21, 3:56 PM #25
There's actually been a lot of problems with people being too big to fit through the oven door. It costs an f'load to get the door resized, too.
2008-04-21, 4:15 PM #26
I wonder if theres a fat tray underneath it like a george foreman grill.
nope.
2008-04-21, 4:47 PM #27
Originally posted by Tiberium_Empire:
OH GOD I SEE NIPPLE


I am not going to look at the picture long enough to evaluate this claim.
If you think the waiters are rude, you should see the manager.
2008-04-21, 7:27 PM #28
The one on the right looks skinny.

Relatively speaking.
"I would rather claim to be an uneducated man than be mal-educated and claim to be otherwise." - Wookie 03:16

2008-04-21, 7:51 PM #29
Only on Massassi can we go from calculus to fat people to crematoriums.
Code to the left of him, code to the right of him, code in front of him compil'd and thundered. Programm'd at with shot and $SHELL. Boldly he typed and well. Into the jaws of C. Into the mouth of PERL. Debug'd the 0x258.
2008-04-22, 1:21 PM #30
was just thinking how horibly derailed this thread had become
2008-04-22, 1:37 PM #31
I hope you all suffocate on your own genitalia.
D E A T H
2008-04-22, 2:11 PM #32
Originally posted by Tiberium_Empire:
OH GOD I SEE NIPPLE


Scary, really scary.
You actually looked at the picture closely enough to spot the nipple.
Tiberium_Empire: Chubby Chaser.

Or Tibby the Tubby Tantaliser... or something >_>
You can't judge a book by it's file size
2008-04-22, 6:41 PM #33
Originally posted by Deadman:
Scary, really scary.
You actually looked at the picture closely enough to spot the nipple.
Tiberium_Empire: Chubby Chaser.

Or Tibby the Tubby Tantaliser... or something >_>

No chubby is all right. Little extra pounds isn't horrific. TE here, is a ****in' hambeast of the highest order chaser.
Code to the left of him, code to the right of him, code in front of him compil'd and thundered. Programm'd at with shot and $SHELL. Boldly he typed and well. Into the jaws of C. Into the mouth of PERL. Debug'd the 0x258.

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