Author Topic: C1 & C2 Discussion here!  (Read 9097 times)

Offline bonny92

  • Newbie
  • *
  • Posts: 2
  • Reputation: -6
Re: C1 & C2 Discussion here!
« Reply #45 on: June 07, 2009, 09:04:57 am »
what was the reason for overestimate?

Offline omega007

  • SF Geek
  • ****
  • Posts: 332
  • Reputation: 42683
Re: C1 & C2 Discussion here!
« Reply #46 on: June 07, 2009, 09:16:15 am »
Reason: Excess area above the region R was taken by each strip (trapezium) made in the exponential curve.

Offline omega007

  • SF Geek
  • ****
  • Posts: 332
  • Reputation: 42683
Re: C1 & C2 Discussion here!
« Reply #47 on: June 07, 2009, 09:17:03 am »
@onhsa....how many marks may we lose for that tricky trigonometric question?

master786

  • Guest
Re: C1 & C2 Discussion here!
« Reply #48 on: June 07, 2009, 10:09:56 am »
3 marks weshud be loosing
 and the reason for the overestimate cud also be the curve shifts inwards ...

Offline hdbkiwi

  • SF Geek
  • ****
  • Posts: 409
  • Reputation: 2
  • Gender: Male
Re: C1 & C2 Discussion here!
« Reply #49 on: June 07, 2009, 11:10:31 am »
The first question: S(2X+3X^(1/2)) (upper value 4; lower value 1) for C2
you get 29
Excuse me... have you seen my sanity... I think I lost it. ;)

Offline motherheaven

  • Newbie
  • *
  • Posts: 40
  • Reputation: 0
Re: C1 & C2 Discussion here!
« Reply #50 on: June 07, 2009, 06:39:02 pm »
in c1 paper wat was the area of triangle OCB in one question last part

Offline hdbkiwi

  • SF Geek
  • ****
  • Posts: 409
  • Reputation: 2
  • Gender: Male
Re: C1 & C2 Discussion here!
« Reply #51 on: June 07, 2009, 07:56:42 pm »
in c1 paper wat was the area of triangle OCB in one question last part
Area Triangle=1/2(b)(h)
=.5(23/5)(8 )
=18.4
Excuse me... have you seen my sanity... I think I lost it. ;)

Offline hdbkiwi

  • SF Geek
  • ****
  • Posts: 409
  • Reputation: 2
  • Gender: Male
Re: C1 & C2 Discussion here!
« Reply #52 on: June 07, 2009, 07:57:28 pm »
and it's 23/5 because the y-intercept (C) was 23/5
Excuse me... have you seen my sanity... I think I lost it. ;)

Offline motherheaven

  • Newbie
  • *
  • Posts: 40
  • Reputation: 0
Re: C1 & C2 Discussion here!
« Reply #53 on: June 07, 2009, 10:06:07 pm »
thnxxx i got the same answer

Offline motherheaven

  • Newbie
  • *
  • Posts: 40
  • Reputation: 0
Re: C1 & C2 Discussion here!
« Reply #54 on: June 07, 2009, 11:05:33 pm »
can anyone tell me the minimum value of r and the minimum value of surface area in c2 paper last question

master786

  • Guest
Re: C1 & C2 Discussion here!
« Reply #55 on: June 07, 2009, 11:21:53 pm »
281 or 280  for surface area
 nd for r i think 6.5565 or smethign similar i dnt rmember :S

Offline motherheaven

  • Newbie
  • *
  • Posts: 40
  • Reputation: 0
Re: C1 & C2 Discussion here!
« Reply #56 on: June 08, 2009, 12:04:39 am »
answer for my surface area was 280 and my value for r was 9.5565. and in c2 paper the question in which we have to apply trapezium rule to find the area .what was the area i was getting about 6.133
« Last Edit: June 08, 2009, 04:40:59 am by motherheaven »

Offline omega007

  • SF Geek
  • ****
  • Posts: 332
  • Reputation: 42683
Re: C1 & C2 Discussion here!
« Reply #57 on: June 08, 2009, 11:36:21 am »
Your answer is right motherheaven.  :D

Offline omega007

  • SF Geek
  • ****
  • Posts: 332
  • Reputation: 42683
Re: C1 & C2 Discussion here!
« Reply #58 on: June 08, 2009, 12:05:47 pm »
The curves are going to be low this time....I wish so... ??? ??? ???

Offline hdbkiwi

  • SF Geek
  • ****
  • Posts: 409
  • Reputation: 2
  • Gender: Male
Re: C1 & C2 Discussion here!
« Reply #59 on: June 08, 2009, 02:40:07 pm »
I have my answers in the formula booklet that they let me keep after the exam lolz^^
So once I get home if anyone needs any specific questions I most likely have them down  :)
Excuse me... have you seen my sanity... I think I lost it. ;)