Mathematics: Post your doubts here!

[TheJDOG]

Anymore doubts guys? Good luck everyone in all your exams

 

[sara kamal]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s14_qp_32.pdf
please explain Q10 part 3

 

[sara kamal]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s14_qp_61.pdf
plzzz explain q6 part4

 

[kitkat <3 :P]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s14_qp_32.pdf
please explain Q10 part 3

Ignore my handwriting please

 

[TheJDOG]

Here are some important questions from O/N 2013 p32 which I felt need to be posted here
Also, I have this doubt, Q8)b) how do we find the Least |z-w| for the loci? It carries two marks :/ , I tried to do it but it's not working :/
Help would be very appreciated for my doubt

 

[TheJDOG]

Continued..

 

[ahmedish]

Can someone help in estimating the mean from cumulative frequencies and such?
in Winter 2013 v62 Q4, we took the classes as 100<x<150 and then 150<x<175 and therefore got midpoints of 125 and 162.5 while in Summer 2011 v63 we took the class as 0-9 and 10-19 and therefore got midpoints of 4.5 and 14.5
When do I do the first one and when do I do the second one? I keep getting confused.

 

[najiya]

Here are some important questions from O/N 2013 p32 which I felt need to be posted here
Also, I have this doubt, Q8)b) how do we find the Least |z-w| for the loci? It carries two marks :/ , I tried to do it but it's not working :/
Help would be very appreciated for my doubt

could u please do 7(ii)
could be really helpfull

 

[TheJDOG]

could u please do 7(ii)
could be really helpfull

ok ill do it for you tomorrow

 

[asadalam]

when is your p3 guys?Anyone here giving stats?

 

[Charlotte20102013]

you have to put the y value into the main equation ln(xy) − y ^3 = 1. to find x

Yes I know eventually how to find it. My question is when you equate eg. x(x-5)=o, you get x=0 and x-5=0. Why isn't it the same for this case then?

 

[Wolfgangs]

Can someone help me with these questions?

 

[DaniyalK]

Here are some important questions from O/N 2013 p32 which I felt need to be posted here
Also, I have this doubt, Q8)b) how do we find the Least |z-w| for the loci? It carries two marks :/ , I tried to do it but it's not working :/
Help would be very appreciated for my doubt

https://malaysia.answers.yahoo.com/question/index?qid=20140919190443AAmSFNU

 

[kitkat <3 :P]

Can someone help me with these questions?

Can you tell from which year it is? Or the final answers?

 

[Wolfgangs]

Can you tell from which year it is? Or the final answers?

Paper 31 May/June 2013

 

[DaniyalK]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s14_qp_61.pdf
plzzz explain q6 part4

When there are repeating letters in combinations, you split them into cases based on how many times the repeating letter occurs.
0A: 3C3 (choosing 3 from T,I,Z)
1As : 3 (from previous part)
2As : 3C1 (choosing 1 from T,I,Z)
3As: 1
Total = 8

 

[omaaaar]

http://maxpapers.com/wp-content/uploads/2012/11/9709_w14_qp_32.pdf
Q5 part 2 can u pls solve and explain

 

[Aina]

Here are some important questions from O/N 2013 p32 which I felt need to be posted here
Also, I have this doubt, Q8)b) how do we find the Least |z-w| for the loci? It carries two marks :/ , I tried to do it but it's not working :/
Help would be very appreciated for my doubt

thankk you

 

[DaniyalK]

http://maxpapers.com/wp-content/uploads/2012/11/9709_w14_qp_32.pdf
Q5 part 2 can u pls solve and explain

let z = x + iy

x + iy = x + iy + i/(i(x+iy) + 2)
(x + iy)(i(x+iy)+2) = x + iy + i
simplify
i(x^2 - y^2 + y) -2xy +x = i
Equate real and imaginary parts
-2xy +x = 0 ----1
x^2 - y^2 + y = 1 ----2
From 1
y = 0.5
use in 2
x = -sqrt3/2 (since the question mentions that the real part is negative)
z = -sqrt3/2 + (1/2)i

 

[Aina]

could u please do 7(ii)
could be really helpfull