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  1. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    well there is nothing to explain i am not a tutor.. refer google.. btw nice signature
  2. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    when ever they say f(x)^-1 = something just put that something in the main f(x) funtion because the x value for the function is the y value for the inverse and vice versa
  3. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    when we put 1 in the equation we must get 3 as the answer because 3 lines are in the 1st diagram so a(1)^3 + b(1) +1=3 a+b=2 1st equation then we must get 12 as the answer if we put 2 in the eqation because 12 lines are needed to make 1st and the 2nd diagram so a(2)^3 +b(2) +2=12 8a+2b=10 2nd...
  4. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    thats not determinant thats modulus if a vector is: x y then its modolus is root of the sum of the square of x and y x^2 + y^2 then root it
  5. N

    Preparing for Maths Paper 4.. Any help that can be provided?

    i just hope they don't play tricks in probablity usually 1 part is tricky
  6. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    14/20=0.7 but they gave as 2.8 which means we need to multiply every value by 4 so 5/20 * 4 =1 29/40 *4 =2.9 32/30 *4 = 4.27
  7. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    it is by chris pearce
  8. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    how am i supposed to know
  9. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    frequency density(height of graph)= frequency/classwidth(the difference between 2 intervals) so 115/2=57.5 but as height of graph is 11.5 means we divide the frequency density by 5 so 35/10=3.5 3.5/5=0.7 26/2=13 13/5 =2.6 24/6=4 4/4 =0.8
  10. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    refer this might help you http://www.youtube.com/watch?v=krgVlYE3xBI
  11. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    we don't use it its just to represent a general form of a quadratic sequence
  12. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    no no guessing look 1cm^2 area is 1cm * 1cm so see how much 1cm in x-axis then how much 1 cm in y-axis then multiply out both
  13. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    1stly my name is Noorullah well explaination is quite difficult here lets try..
  14. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    the form an^2 +bn+c
  15. N

    Preparing for Maths Paper 4.. Any help that can be provided?

    dude don't worry just make it up in p4 if u get like 105 and 35 is 140/200 i think that is A so A is not a bad result just word hard for p4 here are a few notes http://rapidshare.com/files/519904309/RS.rar these are not made by me a but by a really helpful teacher
  16. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    2n^2 +2n ? 12-4=8 24-12=12 12-8=4 a=4/2 a=2 b=8-3(2) b=2 c=4-2-2 c=0 so 2n^2 +2n
  17. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    thanks alot
  18. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    in this sequemce there is a common ration of *2 so use the formula a(r)^(n-1) a=1st number=1 r= common ratio=2 so 1(2)^n-1 so 2^(n-1)
  19. N

    I'm an IGCSE Maths Teacher - Post your questions here.

    -33 + x =y x+y=z so replace y with -33+x x-33+x=z 2x-33=z 2x-z=33 this is the 1st equation then y+z=18 replace y with -33+x -33+x+z=18 x+z=51 this is the 2nd equation solve 2x-z=33 x+z=51 by adding both equations we get 3x=84 x=28 substitute x=28 in 2nd equation 28+z=51 z=51-28 z=23 substitute...
  20. N

    topics which didn't appear in p22

    these topics may come in p42 1. matrices 2. transformations 3. trigonometry 4. line graphs 5. graph of functions 6. linear programming 7. mensuration 8. probablity 9. vectors 10. ratio/percentage
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