Mathematics: Post your doubts here!

[destined007]

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help me with part 1.. P6

 

[destined007]

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4 part !! need help.. tq

 

[destined007]

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Hey guys, i have a question from P1 quadratics.....the question is
Find, correct to 3 significant figures, all the roots of the equation 8x^4-8x^2+1=1/2 3^1/2
i didin't knw hw to write under root 3 so i wrote it dat way......thnx in advance

This is not in the syllabus. Dont bother doing it.

 

[destined007]

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Can someone help me to solve these questions from may/june 2007 03?

Q5ii
q6
and Q8ii

Many thanks in advance

 

[IgoforA]

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any shorter working other than drawing a probability diagram?? for question part1

 

[destined007]

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any shorter working other than drawing a probability diagram?? for question part1

No need to. Just do it in your mind.
like for score of 5, (1,1,3) or (1,2,2) etc.. List all of them.

 

[zenyatales]

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hi?
i have a question from Statistics.
in drawing a cumulative frequency graph , in which cases do we NOT plot at (0,0) ?

the answer key for the graph in this question shows the first plot at ( 2.95, 7), not at (0,0).

any help is greatly appreciated!

 

[IgoforA]

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http://www.xtremepapers.com/CIE/Interna ... 4_qp_6.pdf need help for no 6!! tq

 

[1357913579]

here is doubt-1

 

[destined007]

here is doubt-1

 

[sea_princess]

guys I need someone to explain to me this question ,it's in ocober /november paper 1 varient 2 question 7(iii).
The function f is defined by
f(x) = x^2 − 4x + 7 for x > 2.
The function g is defined by
g(x) = x − 2 for x > 2.
The function h is such that f = hg and the domain of h is x > 0.
(iii) Obtain an expression for h(x).


In the markscheme the answer is x^2 +3, can someon explain it to me and how to get it?

 

[1357913579]

but aRE ALL OF THESE THINGS IN SYLLAABUS AND THEN HOW DO YOU FIND VALUE OF A

 

[Abdulrab]

my answer is x^2 + 19 !! can u tell me which paper is it ??

 

[sea_princess]

november 2010

 

[destined007]

but aRE ALL OF THESE THINGS IN SYLLAABUS AND THEN HOW DO YOU FIND VALUE OF A

Well, it must be in the syllabus that's why they gave this question, right?
You find A just like i told you before, by making 2 equations and finding C and then A.

 

[destined007]

TO THOSE I AM NOT REPLYING, SORRY ABOUT THAT. This 13579 guy has his P1 exam so i will only be helping him for now.

 

[sea_princess]

actually I could use some help too my exam is the day after tomorrow

 

[sea_princess]

I got it and it's so easy
here's the answer:
f(x)=x^2-4X +7 =(x- 2)^2+3
f(x) =h (g) and g(x)= x-2
so h=g^2 +3 meaning that h(x)= x^2 +3

 

[1357913579]

HERE IS THE ANSWER

 

[IgoforA]

same here dude... gonna have my maths exam on p1,p3,p4 and p6.. please help