P3 Urgent Help (Exam in 2 Days)

[yasser37]

HI Everyone
So I went through the past papers and here are the questions I couldn't do... if anyone can help me I'll be thankful

November 04 , Question 10, Part (ii)
June 05 , Question 4, Part (i)
June 05, Question 10, Part (ii) ---> The ms says a vector (2,-4,1) is used. where did that come from?
November 05, Question 10, Part (iii)
November 08 , Question 10 Part (iv)
November 09, Paper 31, Question 7, part (iv)
June 09, Paper31, Question 9, Part (ii)
Please help me

[yasser37]

BUUUUUUUMp

[leebux101]

ok firstly > theres an official thread for P3 doubts so u shud post ur doubts in that thread
secondly > i will tell u the questions that i have done and i still have to 2004 so i cant help u in those.. yet.
i will upload the attachments for your question in just a while. =)

[leebux101]

ok so the attacments are kinda big too
anyway i will explain it here then >>
june 2005 q 4 i >
x=tan0 (0> theta)
x² = tan²0
dx = sec²0 d0
substitute throughout and use identities to get the answer

[leebux101]

june 2005 q 10 ii
(4 -2 2) - (2 2 1) = (2 -4 1)

november 2005 q 10 ii
r = (2 2 1)+t(1 -2 2)
(x y z)=(2+t  2-2t 1+2t)
substitute these values of xyz into the plane equation
solve for t, t= 2/3
get the values of x y z but substituting t
use distance = sqroot [ (x-x1)² + (y-y1)² + (z-z1)² ]
x1 y1 z1 are >> (2 2 1) from the equation of a line

june 2009 q 9 ii) is the same as above

november 08 q10 part iv) >>>
1. 4+2i
2. 4+2i * w
3. 4+2i / w

solve the last two complex numbers and u will get ur vertices.

[yasser37]

Thanks mate
hoping for someone to finish the other questions
I appreciate it +rep

[leebux101]

i am gonna do them in a while.. i will tell u after i am done. =D thanks for the rep. =D

[yasser37]

np mate
I'mma be waitin 

[yasser37]

By the way for the question in june 10 I keep getting the answer as x=1 in the differentiation so if anyone can help showing me the differentiation (part ii)