C1 edexcel doubts!!!

[Igcseboy]

I need urgent help i have my mocks on saturday and so i was practicing the past papers

please any1 help!!!

MAY 2005 Question 8 c
MAY 2006 11 d
JAN 2007 3
MAY 2007 5 and 11 c
JAN 2009 8 b (ii)

[Amr Fouad]

Give me some time

[Igcseboy]

Is 2 hrs enough???

[Amr Fouad]

MAY 2005 Question 8 c:

Area= 0.5 x base x height

base= OC = 7

Height= x-coordinate of P as its perpendicular to the base = 3

Therefore Area- 0.5 x base x height

[Amr Fouad]

Is 2 hrs enough???

lol no i already posted the 1st question

[nid404]

I always have difficulty downloading edexcel papers...


Thanks AF

[Amr Fouad]

MAY 2006 11 d:

What's your problem with triangles lol ?

Anyways:

Area= 0.5 x base x height

height = RS = 2(5^0.5)

Base= PQ= (11+1)^2 1+ (8-2)^2 all square root

therefore area= 45 units of area

[Amr Fouad]

I always have difficulty downloading edexcel papers...


Thanks AF

No prblm nid..But why is that? Tried FEP? 

[nid404]

No prblm nid..But why is that? Tried FEP? 

Yup...the thing is it's not named properly...I get confused as to which paper it is...sometimes im lucky enough to get

thanks...you're doing a great job

[Igcseboy]

in may 2005 11 d how is RS the ht..

Ya i have prb. with area of triangles in C1

[Amr Fouad]

JAN 2007 3:

(a) All u've gotta do is to transform the y-coordinates 3 upwards....

Therefore, the x- asymptote doesnt change..

but the y-asymptote changes to +3 (0+3=3)

In other words, The whole graph shifts by +3 units upwards..x-coordinates dont change


(b) It crosses the x-axis when y=0:

(1/x)+3=0

(1/x)= -3

x= -1/3


It crosses the y-axis when x=0:

(1/0)+3 =y

It gives us math error, therefore it doesnt corss the y-axis

Therefore, only coordinates:

(-1/3, 0)

[Amr Fouad]

in may 2005 11 d how is RS the ht..

Ya i have prb. with area of triangles in C1

RS is the height as it already told you its perpendicular to the base....got it?

[Igcseboy]

RS is the height as it already told you its perpendicular to the base....got it?

oh yes!!!! so the ht.. will always be the one perpendicular to the base??

[Amr Fouad]

MAY 2007 5:

(a) We have to transofrmations..

1. Multiplying the whole function by 3-----> i.e. multiply the y-coordinates by 3-----> still no change in general shape of the curve..

2. +3 near x-----> i.e subtract 3 from x-coordinates ------> graph moves by 3 units to the left...

Asypmtotes:

y-asymptoe: 3x 0=0

x-asymptote: 0-3=-3

Finding coordinates:

Only with y-axis: put x=0:

therefore------> (0, 3/2)

[Igcseboy]

MAY 2005 Question 8 c:

Area= 0.5 x base x height

base= OC = 7

Height= x-coordinate of P as its perpendicular to the base = 3

Therefore Area- 0.5 x base x height

here it is not mentioned tht P is perpendicular???