Qualification > Math
IGCSE MATHS Doubts
big mac:
thank you A@di!!! +rep!
diva_sparkles:
--- Quote from: ang3l on May 18, 2010, 12:03:32 pm ---How do u find Meadian? From the table??
thx
--- End quote ---
if its an odd no thn use n+1/2
if its an even no thn n/2 and n+1/2
Ghost Of Highbury:
--- Quote from: A@di on May 18, 2010, 12:37:01 pm ---gotta find the determinant first = 5t^2 -6t
thus the inverse...
(5t/5t^2-6t -6/5t^2-6t) = (-5t 6)
(-t/5t^2-6t t/5t^2-6t) (t -t)
that means 5t/5t^2-6t = -5t
therefore, 5t^2-6t = -1
-5t^2 + 6t = 1
-5t^2 + 6t -1 = 0
t = 1/5,1
--- End quote ---
2c) multiply the matrices --> (x^2 + 10) = kx
x^2 + 10 - kx =0
x^2 + 8x + 10 = 0
compare the co-efficients of x..
-k = 8
k = -8
Vin:
--- Quote from: mdwael on May 18, 2010, 12:41:34 pm ---Anybody knows where to find the markscheme for paper 4 maths summer year 2000?
--- End quote ---
Vin:
--- Quote from: A@di on May 18, 2010, 12:37:01 pm ---gotta find the determinant first = 5t^2 -6t
thus the inverse...
(5t/5t^2-6t -6/5t^2-6t) = (-5t 6)
(-t/5t^2-6t t/5t^2-6t) (t -t)
that means 5t/5t^2-6t = -5t
therefore, 5t^2-6t = -1
-5t^2 + 6t = 1
-5t^2 + 6t -1 = 0
t = 1/5,1
--- End quote ---
thanks stupid me !! did a silly mistake .. +rep
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