IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => IGCSE/ GCSE => Reference Material => Topic started by: Numb on April 06, 2010, 10:33:06 am

Title: Intensive Revision Worksheets/Resources For Math
Post by: Numb on April 06, 2010, 10:33:06 am: Dear all,
I am in desperate need of INTENSIVE REVISION WORKSHEETS FOR IGCSE MATH
on these topics
-Tranformations
-Vectors
-Cos Rule
-Similarity
-Cumulative frequency graphs and Histograms

THIS IS URGENT. please help if you can.
Title: Re: Intensive Revision Worksheets/Resources For Math
Post by: Saladin on April 06, 2010, 02:14:44 pm: Your book should be suffice, other than that i will try to post topic based papers.
Title: Re: Intensive Revision Worksheets/Resources For Math
Post by: Numb on April 06, 2010, 04:57:02 pm: thank you so much

Extended Math For IGCSE (THE BLUE BOOK )
pg 227

question 9

i need majoir help on that.
and

pg. 205
question 7 b

and question 9 c

ALSO.
Congruency doesn't seem to be in the syllabus but it has come in past papers.
should i study it?
Title: Re: Intensive Revision Worksheets/Resources For Math
Post by: Saladin on April 06, 2010, 05:20:08 pm: In the process of answering.

For 9(a)

$y=0$

Simply make x the subject of the forumula.

You get a hint of why $y=0$ , because in (a), there is no $y$

(b)

$y=-2\frac{1}{2}$

What you have to do in this case is that you have to back solve the equation. And then see what you did to get to the original equation.

(c)

$y=-8x$

(d)

$x=\frac{4}{x-8}<br />$

$x^2-8x-4=0$

Thus to get to -7, $y$ has to equal to $3$ .
Title: Re: Intensive Revision Worksheets/Resources For Math
Post by: Numb on April 06, 2010, 08:39:31 pm: i still didn't get it
Title: Re: Intensive Revision Worksheets/Resources For Math
Post by: Dark Prince on April 07, 2010, 06:36:53 am: hey, can some1 tell me that where can i find Investigating and Modelling Questions for IGCSE Maths...thnkx ;)
Title: Re: Intensive Revision Worksheets/Resources For Math
Post by: Saladin on April 07, 2010, 08:03:23 am: Quote from: Numb on April 06, 2010, 08:39:31 pm
i still didn't get it

All you have to do is get urself back to the original equation, and see what y needs to be in order to get back to that equation. If you dont understand that then do this:

1. Make 0 the subject of the formula
2. Then get it into a form like this : $ax^2+bx+c$
3. Now, compare it to the original equation, $x^2-8x-7$
4. Now determine what y needs to be in order to get that value.
5. Also remember, if $2x^2-16x-9=0$ , then $x^2-8x-4.5$ is also equal to 0.
6. That is often a problem many of my frnds faced.

Hope that helped.
Title: Re: Intensive Revision Worksheets/Resources For Math
Post by: Dark Prince on April 07, 2010, 10:13:39 am: Thnkxxx......dese r great for practice....thnkx again..i ve downloaded them ;D