How to Join
the Fashion Spot / Front Row / Careers, Education & the Business of Fashion
FAQ Calendar Search Today's Posts Mark Forums Read Rules Links Mobile How to Join
Reply
 
Thread Tools Display Modes
18-04-2008
  211
fashion insider
 
Chaky's Avatar
 
Join Date: Oct 2007
Location: UK
Gender: homme
Posts: 2,061
Quote:
Originally Posted by pocodolce View Post
2. By using substitution of u=x^2+4x+1, find the integral of:

∫(x+2)(x^2 + 4x + 1)^4 dx
Question 2 first:

Your integral is in respect of x but you need it in respect of u for the substitution to work.

So start by differentiating the expression you are substituting:

du/dx = 2x + 4

You need to use the fractional behaviour of the differential to rearrange this equation:

dx = du/(2x+4)

  Reply With Quote
 
18-04-2008
  212
fashion insider
 
Chaky's Avatar
 
Join Date: Oct 2007
Location: UK
Gender: homme
Posts: 2,061
Now substitute this into the integral along with the expression for u. So the bit in the second bracket is just u...

∫u^4 (x+2) du/(2x+4)

And can you see how the other bit cancels the (x+2) from the other bracket? This leaves:

∫(1/2) u^4 du

Integrate it and you get:

(1/10) u^5 (+ a constant of integration)

Now substitute back for u:

(1/10) (x^2 + 4x + 1)^5

You can check your answer by differentiating it back.

I'll do the other question later, bit busy right now. You need a diagram!

  Reply With Quote
18-04-2008
  213
fashion insider
 
Chaky's Avatar
 
Join Date: Oct 2007
Location: UK
Gender: homme
Posts: 2,061
Quote:
Originally Posted by pocodolce View Post
1. Find the volume of the solids of revolution formed if the area enclosed between the curves y=x^2 and y=(x-2)^2 is rotated about the x axis?

I know I'm supposed to use the formula:


First of all, do you understand why this formula works? I can try to explain it if you want.

  Reply With Quote
18-04-2008
  214
Fly my pretties... Fly!
 
tortoisie's Avatar
 
Join Date: Oct 2003
Location: Harbin
Gender: femme
Posts: 9,694
Quote:
Originally Posted by Lilliana View Post
^ Mode? Kleidung? Damen,- und Herrenbekleidung?
Thank you!

But I still don't understand what "Art Geschäft" means and how is the word different from Kerngeschäft?

  Reply With Quote
18-04-2008
  215
windowshopping
 
Waldorf's Avatar
 
Join Date: Dec 2005
Gender: homme
Posts: 35
Need Interview someone who works for Fashion.
I would normally would not actually start a thread but I am working on term paper which requires me to conduct interview to anyone who works for fashion industry. Please answer the following questions.

What job you work for?
How did you get this occupation?
Describe a typical day?
What steps did it take to get where you are now?
What are some specific skills needed to be successful in this job?
What is there that gives you personal satisfaction in your job? What are the negatives?
What skills and personal qualifications will help me to get your job?


Thank you and I hope this thread would be helpful as other people who might be working similar to my term paper.

  Reply With Quote
19-04-2008
  216
front row
 
Lilliana's Avatar
 
Join Date: Jun 2002
Location: continental europe
Gender: femme
Posts: 469
well to admit it, these are not words I come across often, if at all. but I would say Art Geschäft means "general branch" like fashion label, and Kerngeschäft is the "core bussiness" like hmm bags for LV.

__________________
Do not take life too seriously, you will never get out of it alive. ~ Elbert Hubbard
  Reply With Quote
19-04-2008
  217
Fly my pretties... Fly!
 
tortoisie's Avatar
 
Join Date: Oct 2003
Location: Harbin
Gender: femme
Posts: 9,694
^ Thank you so much!

In that case, I guess Kerngeschäft is Anzug and the new focus on accessories.

And Art Geschäft would be Boss Orange, Boss Selection and etc., right?

Thanks!

  Reply With Quote
19-04-2008
  218
tfs star
 
yellowetpink's Avatar
 
Join Date: Jul 2007
Location: Scotland
Gender: femme
Posts: 1,953
Right well.

I need to find out what for example :

1hr 34minutes

is in hours.

How do I convert the minutes to hours?

__________________
inspiration
  Reply With Quote
19-04-2008
  219
¡vamos Rafa!
 
stersita's Avatar
 
Join Date: Jun 2005
Location: Spain
Gender: femme
Posts: 7,985
60 mins -- 1 hour
94 mins -- x hours

x = 94 x 1 / 60 = 1,57 hours

maybe? I'm not exactly sure what you mean

__________________
myspace
  Reply With Quote
19-04-2008
  220
Fly my pretties... Fly!
 
tortoisie's Avatar
 
Join Date: Oct 2003
Location: Harbin
Gender: femme
Posts: 9,694
34 minutes in fraction is 34/60 hrs

Therefore 1 hr 34 mins = 1 34/60 hrs

I hope that makes sense!

  Reply With Quote
19-04-2008
  221
¡vamos Rafa!
 
stersita's Avatar
 
Join Date: Jun 2005
Location: Spain
Gender: femme
Posts: 7,985
34/60 looks better than 0.57 :p

__________________
myspace
  Reply With Quote
19-04-2008
  222
Fly my pretties... Fly!
 
tortoisie's Avatar
 
Join Date: Oct 2003
Location: Harbin
Gender: femme
Posts: 9,694
^ Your method looks more easily understandable than mine though :p .

  Reply With Quote
20-04-2008
  223
tfs star
 
Miwi's Avatar
 
Join Date: Sep 2007
Gender: femme
Posts: 1,550
Equations.

sin^2x-sin2x=3cos^x

5sin^2x-3sinxcosx-2cos^2x=0


Thanks in advance!


  Reply With Quote
20-04-2008
  224
tfs star
 
Miwi's Avatar
 
Join Date: Sep 2007
Gender: femme
Posts: 1,550
I made a mistake.
1.) sin² x - sin2x =3cos² x

  Reply With Quote
20-04-2008
  225
fashion insider
 
Chaky's Avatar
 
Join Date: Oct 2007
Location: UK
Gender: homme
Posts: 2,061
Quote:
Originally Posted by °Isa View Post
I made a mistake.
1.) sin² x - sin2x =3cos² x
Ewww!

Okay both of your questions actually have a similar solution.

Use the trig identity sin2x = 2 sin x cos x and substitute it in. Also rearrange the equation so all the terms are on one side.

sin² x - 2 sin x cos x - 3cos² x = 0

What you have is a quadratic equation which you can factorise. That's the tough bit!

  Reply With Quote
Reply
Previous Thread | Next Thread »

Tags
brands, case, celebrity, fashion, homework, industry, influencing, inspired, internet, lifestyle, luxury, needing, nurses, quick, research, student, studies, university
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

monitoring_string = "058526dd2635cb6818386bfd373b82a4"


 
All times are GMT -5. The time now is 08:05 AM.
Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
TheFashionSpot.com is a property of TotallyHer Media, LLC, an Evolve Media LLC company. ©2014 All rights reserved.