Mathematics: Post your doubts here!

[Mohsin41]

hope for the best...... Insha Allah we will do our best.

 

[PANDA-]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_11.pdf
Q7 ii) plzzz

PhyZac solved this question before, search this thread for it.

 

[snowbrood]

PhyZac solved this question before, search this thread for it.

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_12.pdf
q9(i) its urgent

 

[snowbrood]

PhyZac solved this question before, search this thread for it.

pm me ur number

 

[Mohsin41]

n

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_11.pdf
Q7 ii) plzzz

If n is 10 than the answer will be 360/10=36 and for the range within 360 you can get further values e.g 36 +- 360 where n can be 1,2,3,4......

 

[PANDA-]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_12.pdf
q9(i) its urgent

I couldn't solve 9 i (a) when i tried to solve this paper before.
But 9 i (b) is easy... just equate it to 1 and solve.

 

[snowbrood]

I couldn't solve 9 i (a) when i tried to solve this paper before.
But 9 i (b) is easy... just equate it to 1 and solve.

same here

 

[snowbrood]

n
If n is 10 than the answer will be 360/10=36 and for the range within 360 you can get further values e.g 36 +- 360 where n can be 1,2,3,4......

could u solve my question

 

[PANDA-]

I got it...
The limits of the graph of cos^2x are 0 --> 1
multiply both sides by -4
0 ---> -4 ,,,, since 0 is greater than -4 u flip it
-4 ----> 0
add 3
- 1 ---> 3

 

[Anika Raisa]

Can any one please help me with this sum's part iv below please!
(I could do till iii but got badly stuck with part iv)

Q.The complex number −2 + i is denoted by u.
(i) Given that u is a root of the equation x
3 − 11x − k = 0, where k is real, find the value of k. [3]
(ii) Write down the other complex root of this equation. [1]
(iii) Find the modulus and argument of u. [2]
(iv) Sketch an Argand diagram showing the point representing u. Shade the region whose points
represent the complex numbers z satisfying both the inequalities
|z| < |z − 2| and 0 < arg(z − u) < 1/4π. ​

Please help asap am at door! And please draw n upload the diagram here too...pleaaase i m really confused abt the diagram dat i should draw for part iv
Thank u! May u be blessed for helping!​

BESIDES here is the mark scheme below... to me it sounded completely gibberish so i couldnot work out the last part of the sum!​

(iv) Show point representing u in relatively correct position in an Argand diagram B1
Show vertical line through z = 1 B1
Show the correct half-lines from u of gradient zero and 1 B1
Shade the relevant region B1 [4]​

[SR: For parts (i) and (ii) allow the following alternative method:
State that the other complex root is –2 – i B1
State quadratic factor x2 + 4x + 5 B1
Divide cubic by 3-term quadratic, equate remainder to zero and solve for k, or, using
3-term quadratic, factorise cubic and obtain k M1
Obtain k = 20 A1]​

​

 

[Anika Raisa]

Can you please help me with 9709/paper 33 year:October/November 2012 question 10 b (ii). Please help badly stuck with it! Thank you

 

[Rutzaba]

Can you please help me with 9709/paper 33 year:October/November 2012 question 10 b (ii). Please help badly stuck with it! Thank you

link

 

[Anika Raisa]

Can any one please help me with this sum's part iv below please!
(I could do till iii but got badly stuck with part iv)

Q.The complex number −2 + i is denoted by u.
(i) Given that u is a root of the equation x
3 − 11x − k = 0, where k is real, find the value of k. [3]
(ii) Write down the other complex root of this equation. [1]
(iii) Find the modulus and argument of u. [2]
(iv) Sketch an Argand diagram showing the point representing u. Shade the region whose points
represent the complex numbers z satisfying both the inequalities
|z| < |z − 2| and 0 < arg(z − u) < 1/4π. ​

Please help asap am at door! And please draw n upload the diagram here too...pleaaase i m really confused abt the diagram dat i should draw for part iv
Thank u! May u be blessed for helping!​

BESIDES here is the mark scheme below... to me it sounded completely gibberish so i couldnot work out the last part of the sum!​

(iv) Show point representing u in relatively correct position in an Argand diagram B1
Show vertical line through z = 1 B1
Show the correct half-lines from u of gradient zero and 1 B1
Shade the relevant region B1 [4]​

[SR: For parts (i) and (ii) allow the following alternative method:
State that the other complex root is –2 – i B1
State quadratic factor x2 + 4x + 5 B1
Divide cubic by 3-term quadratic, equate remainder to zero and solve for k, or, using
3-term quadratic, factorise cubic and obtain k M1
Obtain k = 20 A1]

AND Also :

Can you please help me with 9709/paper 33 year:October/November 2012 question 10 b (ii). Please help badly stuck with it! Thank you

Link to Question: http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_33.pdf

Link to Mark Scheme: http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_ms_33.pdf
Anika Raisa said: ↑

Can you please help me with 9709/paper 33 year:October/November 2012 question 10 b (ii). Please help badly stuck with it! Thank you​

 

[Anika Raisa]

link

Link to Question: http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_33.pdf

Thank u!

 

[Alice123]

how many of u are giving s1 this year

me tooo

 

[PANDA-]

Ummm... how was it guys?

 

[Tkp]

well it went good by the grace of the God

 

[Manobilly]

Alhamdulillah good

 

[Maz]

Messed up pretty bad!!!!
btw can we discuss it today by evening

 

[Alice123]

Ummm... how was it guys?

Was it hard?