Mathematics: Post your doubts here!

[Suchal Riaz]

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oh its so easy. i just left it because i thought you would be able to do it as its only one mark question look at it:

 

[ZaqZainab]

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oh its so easy. i just left it because i thought you would be able to do it as its only one mark question look at it:

you told me to do f inverse

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part iii please

anyways thanks for your time and to usama i got it

 

[ZaqZainab]

Thought blocker this might make more sense

 

[Suchal Riaz]

you told me to do f inverse

anyways thanks for your time and to usama i got it

that was supposed to give the correct answer. i don't know why it doesn't. maybe i need to check it. but i am not in mood.
and did you get it by my explanation or someone else explained it to you?

 

[usama321]

that was supposed to give the correct answer. i don't know why it doesn't. maybe i need to check it. but i am not in mood.
and did you get it by my explanation or someone else explained it to you?

Well Suchal, there are things called a bit complicated questions Not every question is easy. I had done this one before by using inverse, and did not get the right answer. I don't know the reason why it gives the wrong answer though

 

[Thought blocker]

Suchal Riaz do q10ii) from http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s09_qp_1.pdf

 

[ZaqZainab]

that was supposed to give the correct answer. i don't know why it doesn't. maybe i need to check it. but i am not in mood.
and did you get it by my explanation or someone else explained it to you?

usama explained and thought blocker you were kinda late but i appreciate you helped
i was just trying to say its not simple even you thought it was f inverse the same happened with me

 

[Thought blocker]

usama explained and thought blocker you were kinda late but i appreciate you helped
i was just trying to say its not simple even you thought it was f inverse the same happened with me

SAME HAPPENED TO ME! :'(

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s09_qp_1.pdf
question 10

10
i) 2(x^2-6x)+13
=2(x-3)^2+13
2(x^2-6x+9)+13
2x^2-12x+18 (-18+13=-5)
so 2(x-3)^2-5 ; a=2 b=-3 c=-5

ii) At x = 3 there is line of symmetry so A = x value so 1 is given zero and from 2(x-3)^2-5 we get A as 3 but we have 2 out the bracket hence A=6

iii) Range means all the values of y axes that graph covers, here , it is from xero to 13

iv) We have to show that it is one to one function so at x= 3 it is one to one, and 4 > 3 it has an inverse

v) Replace x by y and y by x
2(y-3)^2-5=x
make y the subject
we get y = ((root of x + 5)/2) + 3
replace y with f inverse sign and here is your answer.

Good luck

 

[daredevil]

plz solve this quest and explain too

 

[Suchal Riaz]

usama explained and thought blocker you were kinda late but i appreciate you helped
i was just trying to say its not simple even you thought it was f inverse the same happened with me

actually i didn't to the complete question. when i looked at f(x) in completed-sqaure form it suddenly struck to me how it has to be done. and believe me i have done this question. maybe in mocks. but as i didn't do complete question and i had to go for dinner at that time, i told you wrong answer.

 

[Suchal Riaz]

asma tareen ZaqZainab usama321 Thought blocker
please tell me which papers to do of math M1 and P1 before 2009
I want most tricky papers. not just-another-paper.

 

[Thought blocker]

asma tareen ZaqZainab usama321 Thought blocker
please tell me which papers to do of math M1 and P1 before 2009
I want most tricky papers. not just-another-paper.

I told you on fb!!! How was that ?

 

[ZaqZainab]

asma tareen ZaqZainab usama321 Thought blocker
please tell me which papers to do of math M1 and P1 before 2009
I want most tricky papers. not just-another-paper.

i found the papers quite easy before 2009

 

[Suchal Riaz]

i found the papers quite easy before 2009

i have done after 2010. and i will do 2013 on the last day.

 

[Suchal Riaz]

I told you on fb!!! How was that ?

i want before 2009
and i did those questions wrong because i wasn't in mood of doing anything.
after question 3 my all questions are correct. and it was not a difficult paper.
a good paper is one from which you can learn something. where the examiner can trick you, even for a moment.
but P1 is all like find max point, find point of intersection find area under graph etc
i have been doing these kinds of questions for two years

 

[Thought blocker]

i have done after 2010. and i will do 2013 on the last day.

did u upload that 2011 paper on dropbox ?

 

[Suchal Riaz]

believe me add math is harder than P1 and M1
and i have an A* in that.
i want hard questions to solve. i don't want to waste time in doing simple questions.

 

[Thought blocker]

i want before 2009
and i did those questions wrong because i wasn't in mood of doing anything.
after question 3 my all questions are correct. and it was not a difficult paper.
a good paper is one from which you can learn something. where the examiner can trick you, even for a moment.
but P1 is all like find max point, find point of intersection find area under graph etc
i have been doing these kinds of questions for two years

Upload that solutions bro!

 

[Suchal Riaz]

did u upload that 2011 paper on dropbox ?

no. and i won't. its not neat. i did it in parts. in different locations.