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did u ppl get the answers to maths p3 2013?
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who did the stats ppr today?
I did. How did it go for you?
it was great! how'd you find it?
Do you have the statistics paper 72 too?did u ppl get the answers to maths p3 2013?
i have em... contact me...
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_12.pdf
Hi guys....For number 4 ii) I em getting 8 for K..However the marking says its 8.5...how to solve?thanx
remember that wen evr it says that u need to calculate the tangent the discriminant wud be equals to 0
b^2 -4ac =0
now we make y the subject of formula and substitute it into eq of curve
2y+ x =k
2y= k-x
y= (k-x)/2 substitute the value into curve
y ^2+2x =13
((k-x)/2 )^ 2 +2x= 13
((k^2 -2kx +x^2)/4)) +2x =13
(k^2 -2kx +x^2) +8x =52
you get
x^2 + (8-2k) x + (k^2-52)
a=1 b= 8-2k c= k^2 -52
b^2 -4ac
(8-2k)^2 - 4(1)(k^2 -52) =0
64- 32k +4k^2 -4k^2 +208 =0
-32k + 272=0
32k= 272
k= 8.5
Thank you so much !
remember me in ur prayers ^_^
Question No 9.1st part.....i cant solve it.....and the mark scheme says : one limit is -1 and other is 3...
Can some one explain please...
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