d2jsp
Log InRegister
d2jsp Forums > Off-Topic > General Chat > Homework Help > Calculus
12Next
Add Reply New Topic New Poll
Member
Posts: 13,480
Joined: May 27 2013
Gold: 74.00
Nov 12 2017 02:49pm
Hi guys, I’m doing my Bachelor and my school doesn’t provide past year answers for my maths papers.

I need help verifying the answers for my revision for finals.

I’m offering 1k fg to do my past year papers with proper steps/answers

Since I have no idea what answers is right, I’ll be picky with who I choose.

Topics covered are;
- Optimisation (d2y / dx2 > 0)
- Newton’s Method (I know how to do)
- Simpson / Trapzoidal (I know how to do)
- Interest (not the simple one, but the one with time diagram)
- Integration by Parts (no trigo, only exponential)
- Continous Compounded Interest (e^rt {integral of f(t) E^-rt}
- Multi variable Calculus


Before I choose, you’d need to do a small qn for me to actually verify you know your shit.

Post if you’re comfortable.

This post was edited by Receptor on Nov 12 2017 02:53pm
Member
Posts: 16,662
Joined: Nov 24 2007
Gold: 15,245.00
Trader: Trusted
Nov 17 2017 04:43pm
Post your questions here, you'll be helped for free.
Member
Posts: 12,037
Joined: Jun 3 2006
Gold: 6,723.69
Nov 18 2017 08:15am
Vouch for feanur's proficiency in mathematics. Got me through the maths part of the MCAT in Belgium :p
Member
Posts: 13,480
Joined: May 27 2013
Gold: 74.00
Nov 18 2017 01:13pm
Quote (feanur @ Nov 18 2017 10:43am)
Post your questions here, you'll be helped for free.


Ok, can I not post, but put in imgur?
Member
Posts: 13,480
Joined: May 27 2013
Gold: 74.00
Nov 18 2017 01:18pm
Find the volume of the solid under the surface z = (x^2 - 2xy + y^2)^0.5 over the region: R = {(x,y}, 0 <= x <= 1 | 0 <= y < = 1 }
Basically I know how to double integrate
But I don't know what's the points to use, how do you visualise this shit.
Member
Posts: 13,480
Joined: May 27 2013
Gold: 74.00
Nov 18 2017 01:20pm


thats all for this year's paper which i am uncertain to do

This post was edited by Receptor on Nov 18 2017 01:24pm
Member
Posts: 13,480
Joined: May 27 2013
Gold: 74.00
Nov 19 2017 12:13pm
No replies :(
Member
Posts: 16,662
Joined: Nov 24 2007
Gold: 15,245.00
Trader: Trusted
Nov 19 2017 05:28pm
1.

x² - 2xy + y² = (x-y)²

√(x² - 2xy + y²) = | x - y |

So you can double-integrate like this :

∫(x=0 to 1) ∫(y=0 to 1) | x - y | dx.dy

= ∫(x=0 to 1) [ ∫(y=0 to x) (x - y) dx.dy + ∫(y=x to 1) (y - x) dx.dy ]

= ∫(x=0 to 1) [ x²/2 dx + (x²/2 - x + 1/2) dx ]

= ∫(x=0 to 1) ( x² - x + 1/2) dx

= 1/3
Member
Posts: 16,662
Joined: Nov 24 2007
Gold: 15,245.00
Trader: Trusted
Nov 19 2017 05:35pm
2. I'm not sure to understand the terms of your problem.

$25,000,000 - $5,000,000 = $20,000,000

So the buyer is taxed of 4% monthly upon this sum ?

4% of $20,000,000 is $800,000

He can't make the full payment by paying $200,000 per month ...

Isn't it 4% per year, instead ??
Member
Posts: 13,480
Joined: May 27 2013
Gold: 74.00
Nov 20 2017 08:11am
Quote (feanur @ Nov 20 2017 11:35am)
2. I'm not sure to understand the terms of your problem.

$25,000,000 - $5,000,000 = $20,000,000

So the buyer is taxed of 4% monthly upon this sum ?

4% of $20,000,000 is $800,000

He can't make the full payment by paying $200,000 per month ...

Isn't it 4% per year, instead ??


I'm not sure
it has things to do with annuity and shit like that
Go Back To Homework Help Topic List
12Next
Add Reply New Topic New Poll