• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Mathematics: Post your doubts here!

Messages
1
Reaction score
0
Points
1
Can anybody help me to resolve the exercise number 4 from maths exame summer 2009 pure maths 1 please? Thanks a lot :)
 

WSK

Messages
8
Reaction score
5
Points
13
Anyone Please can email me ([email protected]) the Conversion notes for Maths
like a place where everything is written for Eg: 1cm= 1/100m something like that Please please
 
Messages
9
Reaction score
-1
Points
13
how do u find the 2 by 2 matrix from a given transformation ???????????????
pleeeeeeeeeeease someone help!!!!!!
 
Messages
26
Reaction score
2
Points
3
Can any1 tell me about the curve on oct/nov 2011 for math
I want to know for both paper2 & 4 ..
Plz reply me asap :)
Tnx
 
Messages
4,152
Reaction score
12,461
Points
523
HI, I was practicing some math past papers and Iam stuck on Q17 summer 2007 http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s07_qp_2.pdf please I need help ASAP! Thank you:)

(a) (32)^(1/2) means "Square root of 32"

(32)^(1/2) = 2^p

(2^5)^(1/2) = 2^p

2^[5*(1/2)] = 2^p

2^(5/2) = 2^p

Since the bases are same:

p = 5/2 :)

(b) (1/8)^(1/3) means "Cube root of (1/8)"

(1/8)^(1/3) = 2^q

[1/(2^3)]^(1/3) = 2^q

(2^-3)^(1/3) = 2^q

2^[(-3)*(1/3)] = 2^q

2^-1 = 2^q

Since the bases are same:

q = -1 :)
 
Messages
373
Reaction score
125
Points
53
Hey guys, I am having a question in MJ 06 Paper 2, question 14. Here is the link:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s06_qp_2.pdf

The question is:
14 A company makes two models of television.
Model A has a rectangular screen that measures 44 cm by 32 cm.
Model B has a larger screen with these measurements increased in the ratio 5:4.
(a) Work out the measurements of the larger screen.

How can I get the measurements of the larger screen?
 
Messages
50
Reaction score
18
Points
18
Hey guys, I am having a question in MJ 06 Paper 2, question 14. Here is the link:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s06_qp_2.pdf

The question is:
14 A company makes two models of television.
Model A has a rectangular screen that measures 44 cm by 32 cm.
Model B has a larger screen with these measurements increased in the ratio 5:4.
(a) Work out the measurements of the larger screen.

How can I get the measurements of the larger screen?
Look the easiest way to think of it is this way:
5:4= 5/4 . so when you multiply 5/4 * each measurement it will give you the larger measurement.
5/4 * 44 = 55
5/4 * 32 = 40
 
Messages
50
Reaction score
18
Points
18
Can some one help me in question number 15 (b):
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w06_qp_2.pdf
f: x  I----------> 5 − 3x

(b) Find f^-1(x)
Ok... When you are dealing with functions and you want the inverse of a function (i.e : 5-3x) , you have to do the following :
1- change f:x into Y. So it will be y=5-3x
2-make x the subject : y-5=3x(moved 5 to the other side )
so x= y-5/3
3- Final step is change x to F^-1 (x) (the letter doesn't have to be F it can vary according to the question) , and change any x's into Y.
So here the answer will be F^-1 (x) = x-5/3
Btw what grade are you, i am assuming you are pre-IG right?
 
Messages
373
Reaction score
125
Points
53
Ok... When you are dealing with functions and you want the inverse of a function (i.e : 5-3x) , you have to do the following :
1- change f:x into Y. So it will be y=5-3x
2-make x the subject : y-5=3x(moved 5 to the other side )
so x= y-5/3
3- Final step is change x to F^-1 (x) (the letter doesn't have to be F it can vary according to the question) , and change any x's into Y.
So here the answer will be F^-1 (x) = x-5/3
Btw what grade are you, i am assuming you are pre-IG right?
Grade 10 lol. Doing my final IGCSE this year.
 
Messages
373
Reaction score
125
Points
53
Ok... When you are dealing with functions and you want the inverse of a function (i.e : 5-3x) , you have to do the following :
1- change f:x into Y. So it will be y=5-3x
2-make x the subject : y-5=3x(moved 5 to the other side )
Shouldn't it be y-5=-3x?
 
Messages
50
Reaction score
18
Points
18
But dude btw you should be knowing functions and these stuff before going into the exam. I suggest you give a quick look into math notes ;)
 
Messages
373
Reaction score
125
Points
53
But dude btw you should be knowing functions and these stuff before going into the exam. I suggest you give a quick look into math notes ;)
My good friend, I already know all of this function calculations. I even answered exactly what you just did.

I think you and I both made a mistake. In the mark scheme the answer is (5-x)/3

I did exactly what you just did but got a different answer from the mark scheme. Because I too got x-5/-3

Actually, I believe there is something wrong with the mark scheme.
 
Top