Mathematics: Post your doubts here!

[notnek01]

URGENT HELP.​

QUESTION 3a) i)​

Question paper: http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_42.pdf​

Why isn't it x≥4 ?? the answer is x>4 ​

Mark scheme: http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_s12_ms_42.pdf​

There's a mistake in the mark scheme. All < or > should be <= or >=.

The correct answers are in the examiners report.

 

[sdcsdsd]

http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w08_qp_04.pdf
Question 5e and 6b(ii)

 

[sdcsdsd]

http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w08_qp_04.pdf
Question 5e and 6b(ii)
Please Reply Fast

 

[weirdoatlarge77]

Thank you so much notnek01 and ramie majed!

 

[shazmina]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_42.pdf could u plzzz let me knw hw to solve de question no 10 part (d).... ie de sequence

 

[Ahmed Al Hilali]

For 6 d just draw a STRAIGHT line which is y-10 and the other stays the same

for 8c use yo scale to know how many squares are one centimeter horizontal and vertical
so you will know 5 boxes vertical and horizontal are 1 cm
and vertical is X axsis so now you know for i cm^2 you will have 5 frequency density
and horizontal is Yaxisis so no you will have 0.5 minutes on the y axsis as the time
The formula is Frequncy Density= Frequency/Class with
5=x/0.5
5*0.5=2.5 i hope yo understood i will work on your other questions too

Thanks A Lot !

 

[Timi Adeg]

Is there a general formula that can be used to solve sequence or Nth term questions. I'm talking those hard long ones at the back of most math paper 4's

 

[Henna Islam]

i have doubts in ratio and proportional...please help

 

[manya]

this is oct nov 2009 paper 4 question 2

 

[ZaqZainab]

this is oct nov 2009 paper 4 question 2

why did you take A :/ as (1,0) why not (2,0_ or something else i have never be taught about this
and thank you so much for such a great effort to help me

 

[Ahmed Al Hilali]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w10_qp_42.pdf

Q 8 b
Q 9 a , why 7/10 and 3/10 ?
Q9 c

 

[Rockzstar]

how can we understand if it is x=y or y=x or y=-x or -y=x etc ???

 

[Timi Adeg]

noo theres absolutely nothing.... u only have to think about them to figure them out!

Nahh trust me, there is something. Better learn it

 

[manya]

why did you take A :/ as (1,0) why not (2,0_ or something else i have never be taught about this
and thank you so much for such a great effort to help me

well this is not a proper method of finding a matrix but my teacher taught me by this way and its easier . since the matrice for rotation with (0,0) and reflection on x axis, y axis .x=y and x=-y. we always have 1 or 0 in the matrix we take A as (1,0) AND B as(0,1). u can always check ur answer by using the formula M=I*odject inverse. by taking two pionts

 

[shazmina]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w10_qp_41.pdf
could u plzzz let me knw hw to solve de question no 9 (a) 4... ie regarding sequence....

 

[manya]

u made a mistake its (1-101)

which one.please specify

 

[manya]

u made a mistake its (1-101)

oh yeah so sorry that was by mistake.

 

[xpfaddict]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s11_qp_42.pdf
PLEASE ANSWER 7D

 

[xpfaddict]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s11_qp_42.pdf
Question 9C

 

[manya]

this is the answer of oct nov 2012 p2 q no 1 dii