AS math 9709/May June/2018/ Paper 12 Hard Or Easy?

[A*****]

you mean i can still score in this one?

Atleast partial credit will be given as far as I think

 

[A*****]

p and q were 2 and 6. i just found the points and showed their gradients were same to prove y=x idk if i'll get ecf for this method

Wait wait...the gradients were not same
How can the lines meet if the gradients were same...

 

[ThePacifics]

i meant for the points, thats all.

 

[A*****]

Btw why was the paper yellow??

 

[ThePacifics]

wtf? the papers were leaked!? no wonder specific questions were trickier otherwise we would have gotten pattern similar to march, since they keep an extra question paper for such instances, they might have used it and we got those woah

 

[Bai fong]

p and q were 2 and 6. i just found the points and showed their gradients were same to prove y=x idk if i'll get ecf for this method

they cant be the same... the gradient of one should be the -ve reverse of the other.... and yes their points of intersection meet on the line y=x , which when you equate both, gives you an x that equals to the y

 

[Bai fong]

2y + 3x = k
2y = -3x + k
m of perpendicular bisector = -(3/2)
m of line AB = -(3/2) x m (ab) = -1
M ab = 2/3

5h -h/ (4h+6) -h = 2/3
4h /3h +6= 2/3
12h =6h +12
h = 2

A = ( 2,2) B ( 12 ,10)
Mid of AB = (7 , 6)
2(6) + 3(7) =k
k =33

 

[Bai fong]

y = 4
y = x/2 + 6 /x
4 = x/2 + 6/x = > x^2 -8x + 12
(x-6)(x-4) = 0
x= 6 or x=4

dydx = 0.5 - 6/x^2
m at x = 6, is 1/3
m at x =2 is -1
point p ( 2,4) point q (6,4)
equation of tangent passing through p , y - 4 / x - 2 = -1 => y= -x + 6
equation of tangent passing through q, y -4 / x -6 = 1/3 => y= [x+6]/3
equation both, -3x + 18 = x +6 => -4x =-12 , x = 3
when x = 3 , y = -3 + 6 = 3
hence shown y =x

 

[Bai fong]

feel free to do the volume part lol, im tired , u got all the info necessary, limits 6 and 2
[4 - (x/2 + 6/x )]^2

 

[angryrider_56]

Guys my paper was dark yellow? is this normal?

 

[Mts.99]

binomial, a = 3
k<9 and k = 11

a = 8000 , r = 1.02

h= 1 k =22

a = 7 b= -4 , for no solution k > 7 , and k < 3

x = 146 , 323
range for which 2cos > -3sin , 0 >x> 146

waitt wasnt it k>11 and k<3??

 

[Mohammad2018]

For geometric sequence question was n=12 or n=13

 

[Mts.99]

For geometric sequence question was n=12 or n=13

12

 

[Paula V]

waitt wasnt it k>11 and k<3??

I got that too

 

[Paula V]

Guys my paper was dark yellow? is this normal?

The original paper 12 was leaked so Cambridge sent out replacement papers, that's why it was dark yellow.

 

[ASSmart]

binomial, a = 3
k<9 and k = 11

a = 8000 , r = 1.02

h= 1 k =22

a = 7 b= -4 , for no solution k > 7 , and k < 3

x = 146 , 323
range for which 2cos > -3sin , 0 >x> 146

wasnt it k>9 as the inequality sign reversed cuz of dividing it by a negative value?

 

[ASSmart]

Why was paper 12 yellow?

 

[ASSmart]

For geometric sequence question was n=12 or n=13

it was n=12, tricky cuz in the 2018 f/m paper n was 61 days

 

[Paula V]

wasnt it k>9 as the inequality sign reversed cuz of dividing it by a negative value?

but wasn't it ">" in the beginning so after you divide by the negative value it turns to "<"?

 

[ASSmart]

but wasn't it ">" in the beginning so after you divide by the negative value it turns to "<"?

I dont remember exactly but the question said that the curve didnt intersect right?