Mathematics: Post your doubts here!

[ahmedish]

hey does anyone know any tips for the actual exam? like how to check your answers to make sure youre going in the right direction and such?

 

[ahmedish]

Someone help me with this S1 problem. It's from O/N/13 - 61. I solved it (attached the picture) - my distribution for X is wrong; can someone please explain why the distribution for X is lower than that for Y? I attached the markscheme screenshot too, haha. Please help!
View attachment 52744
View attachment 52746

youre 3 standard deviations below and above the mean. so 3 x sqr rt of 49 below and above, so 21 below 30 and 21 above 30 and so from 9 to 51

 

[Heyyy]

hey does anyone know any tips for the actual exam? like how to check your answers to make sure youre going in the right direction and such?

Are you asking about P3 or S1?
In P3 it is better just to review your answer and then proceed to the next.If you start checking whether your answer is correct it will take a lot of time and cause trouble later.Just review the working for any careless errors.In the end if you have time go through all the answers again,especially those you have your doubts on.In p3 it will be better to solve the easier questions first;those you're well acquainted with.

In S1,leave permutation and combination for the last.You should attempt other questions in order.I don't think there is any way to check your answers except for in normal distribution where you can check the probability by reversing.Again,it would be helpful to check in the end if time permits.

Try not to confuse yourself about a particular solution.There are times when you think what you've done is wrong although it's correct.

 

[Emadthegreat]

Are you asking about P3 or S1?
In P3 it is better just to review your answer and then proceed to the next.If you start checking whether your answer is correct it will take a lot of time and cause trouble later.Just review the working for any careless errors.In the end if you have time go through all the answers again,especially those you have your doubts on.In p3 it will be better to solve the easier questions first;those you're well acquainted with.

In S1,leave permutation and combination for the last.You should attempt other questions in order.I don't think there is any way to check your answers except for in normal distribution where you can check the probability by reversing.Again,it would be helpful to check in the end if time permits.

Try not to confuse yourself about a particular solution.There are times when you think what you've done is wrong although it's correct.

what abt s2?

 

[Heyyy]

what abt s2?

I don't take s2.

 

[asadalam]

I don't take s2.

Any help in permutations?I never seem to get those ones right,even if all else is correct.

 

[The Sarcastic Retard]

Any help in permutations?I never seem to get those ones right,even if all else is correct.

Chapter 3

 

[asadalam]

Chapter 3

Thanks,after seeing that somehow i got 6/9 in one

 

[The Sarcastic Retard]

Thanks,after seeing that somehow i got 6/9 in one

The videos there are for clearing your basics and trick to crack tricky question patterns. Rest it depends on your knowledge of mathematics how you take the question. Keep practicing. You will score 9 on 9 easily in few days. ^_^
Good luck.

 

[sara kamal]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s12_qp_32.pdf
anyone?plz explain Q9 part 2...i really dont get why they are integrating by parts twice??i have done like this:

 

[qwertypoiu]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s12_qp_32.pdf
anyone?plz explain Q9 part 2...i really dont get why they are integrating by parts twice??i have done like this:
View attachment 53871

Note that
(ln x)^2 is not the same as ln(x^2)

 

[Jennifer4678]

Hey!! Can someone help me with Q10 , (b) (ii) please

 

[Aina]

http://onlineexamhelp.com/wp-content/uploads/2013/11/9709_s13_qp_32.pdf
help...q6 and q10 part ii
http://www.studentbounty.com/pastpa...athematics (9709)/2013 Jun/9709_s13_qp_31.pdf
plz tell me
Q7 part (b)
Q8 part (b)
plz solve this for me >>>>

 

[Tushar968]

hi can someone help me
when can i use ln while integrating?
how can i calculate the greatest value and least value of argument?
how can i expand (1+x)(2+2x)^-1

 

[ahmedish]

Are you asking about P3 or S1?
In P3 it is better just to review your answer and then proceed to the next.If you start checking whether your answer is correct it will take a lot of time and cause trouble later.Just review the working for any careless errors.In the end if you have time go through all the answers again,especially those you have your doubts on.In p3 it will be better to solve the easier questions first;those you're well acquainted with.

In S1,leave permutation and combination for the last.You should attempt other questions in order.I don't think there is any way to check your answers except for in normal distribution where you can check the probability by reversing.Again,it would be helpful to check in the end if time permits.

Try not to confuse yourself about a particular solution.There are times when you think what you've done is wrong although it's correct.

You can check your normal distribution answers with your calculator. Just go mode>stat>AC then shift 1>Dist>P(
enter your values any it does it for you. I use it in case I get the wrong values from the table. And thanks for your help anyway.

 

[..sacrifice4Revenge..]

Any past paoer question on trapezium rule.

 

[Wolfgangs]

Can someone please explain Q10 part 3?

http://maxpapers.com/wp-content/uploads/2012/11/9709_s12_qp_32.pdf

 

[The Sarcastic Retard]

Any past paoer question on trapezium rule.

http://www.examsolutions.net/maths-...-rule/exam-questions/Edexcel/C4/questions.php

 

[The Sarcastic Retard]

Can someone please explain Q10 part 3?

http://maxpapers.com/wp-content/uploads/2012/11/9709_s12_qp_32.pdf

https://www.xtremepapers.com/commun...st-your-doubts-here.9599/page-588#post-757954

 

[The Sarcastic Retard]

For s1 practice this paper: http://themathelp.com/pdf/a level s1.pdf
Kruthi