How was AS Math P1?

[A star]

got same answer but I did half question on answer sheet and half on extra sheet would it cause any problem?????

if correctly attached then no

 

[FRENZYAMU]

I wrote the same exact thing.

then lets take satisfaction.....

 

[Rain]

The question gives point R (-1.3) and line of 3y + 2x = 33 as the mirror. We are looking for the image of R, (let's name it as P)

Rearranging the equation of the mirror gives us y = -2x/3 + 11

Therefore gradient (m) of mirror is -2/3.

Since we understand that the line PR will be PERPENDICULAR to mirror (properties of reflection), therefore m of PR = 1.5.

Work out the equation of PR from the point (-1,3) and m of 1.5

y - 3 = 1.5 (x+1)

y = 1.5 x + 4.5

Another properties of mirror is that distance from object to mirror = distance from image to mirror. Therefore point of intersection of line PR and the mirror will be the MIDPOINT for line PR.

Working out simultaneous equation on PR and mirror,

y = 1.5 x + 4.5
y = -2x/3 + 11

1.5 x + 4.5 = -2x/3 + 11

9x + 27 = -4x + 66

13x = 39
x = 3

Subs x = 3 to any of the 2 equation above, we will get y = 9

Since we know R, and the midpoint, we can work out P.

(-1 + x)/2 = 3 for the x-coordinate and (3+y)/2 = 9 for the y-coordinate

Therefore x = 7 and y = 15

Wow, and I was only able to work out the gradient- ran out of time

 

[hady94]

Is there any hope that the Math P1 gt will be around 55/56 ?
I mean it can't be 60 or above right ?
This paper was pretty hard compared to Nov. 2012 and June 2012 don't you think ?

 

[ali khan saaed]

Is there any hope that the Math P1 gt will be around 55/56 ?
I mean it can't be 60 or above right ?
This paper was pretty hard compared to Nov. 2012 and June 2012 don't you think ?

it will be less than 60
insha-allah

 

[shafayat]

No Problem Man ! You will only get Half the marks

got same answer but I did half question on answer sheet and half on extra sheet would it cause any problem?????

 

[shafayat]

it will be less than 60
insha-allah

Is there any hope that the Math P1 gt will be around 55/56 ?
I mean it can't be 60 or above right ?
This paper was pretty hard compared to Nov. 2012 and June 2012 don't you think ?

Less than 60 ? u mean 59 ? !! yeah that is exactly what its gonna be
my sir says 58-62 so I expect a 60 to be A ... all the best

 

[Nadia Hossain]

When do you think the original gt will be out?

 

[NouranAyman]

In Q 7 Guys point R is the reflection of point (-1,3) on that line giving and we were supposed to find R not that pointtt.....cuz i saw u guys took point R as (-1,3) and ur finding its reflection

 

[shafayat]

When do you think the original gt will be out?

that will be after November 2013 .. y do u neet original gt ? u will get ur results b4 that

 

[shafayat]

In Q 7 Guys point R is the reflection of point (-1,3) on that line giving and we were supposed to find R not that pointtt.....cuz i saw u guys took point R as (-1,3) and ur finding its reflection

the point R doesn't matter, once we get the answer The examiner will ignore that mistake

 

[shafayat]

OKEI GUYS !
for the domain range question
1- the function was increasing, bcuz the gradient is above zero ( dy/dc = positive value)
2-the range is y>=2
domain -2<=x<0
don't ask me how, cuz I asked the same thing to my teacher (HOW??) and his reply was 'don't ask me how'

 

[SalmanPakRocks]

Hi fellow members,

Just want to ask you guys what the answers/solutions are for the quadratic equation in cos^2x (or was it cos^2 theta??)

Thanks!
(Were there four solutions?)

answer to the first part was 10
and second part, we had 2 answers.

 

[pakiboy]

OKEI GUYS !
for the domain range question
1- the function was increasing, bcuz the gradient is above zero ( dy/dc = positive value)
2-the range is y>=2
domain -2<=x<0
don't ask me how, cuz I asked the same thing to my teacher (HOW??) and his reply was 'don't ask me how'

it was -2.5 instead of -2

 

[yazan1995]

guys don't you think that oct/nov 2012 (12) was easier than this paper ? and A was 55/75 . it would be perfect if this paper is also 55/75

 

[NouranAyman]

the point R doesn't matter, once we get the answer The examiner will ignore that mistake

do u remember how much u got for the answer?

 

[raysonzaffar]

I wrote same but real ans was 0<x<-2.5
That was a trick

What so u mean to say that the function was less than -2.5 but greater than What ???

 

[equus231]

My fellow xtremers, I present to you - the end to all discussions and arguments:
A hand written mark scheme for Mathematics P12 May/June 2013
http://dynamic-marketing.blogspot.com/2013/05/cie-pure-maths-paper-1-mayjune-2013.html
Thank me later

 

[0Louis0]

My fellow xtremers, I present to you - the end to all discussions and arguments:
A hand written mark scheme for Mathematics P12 May/June 2013
http://dynamic-marketing.blogspot.com/2013/05/cie-pure-maths-paper-1-mayjune-2013.html
Thank me later

Thanks for the link!
Though it's written by a teacher, so all the answers are not necessarily correct.
Last year for paper 2 someone posted a teacher's answers and it had some mistakes

 

[Rain]

My fellow xtremers, I present to you - the end to all discussions and arguments:
A hand written mark scheme for Mathematics P12 May/June 2013
http://dynamic-marketing.blogspot.com/2013/05/cie-pure-maths-paper-1-mayjune-2013.html
Thank me later

Thank you
Finally my doubts are cleared.