Mathematics: Post your doubts here!

[WayneRooney10]

Dude, just multiply your two answers from part i) to get one quadratic factor and find the other one by (Ax^2 + Bx + C) inspection.
That is, the roots you get in i) are 1 - √2 i and 1 + √2 i. So the factors become (x-1+√2 i)(x-1-√2 i). You multiply the brackets and you'll see everything in terms of 'i' gets cancelled to give you a quadratic factor of x^2 - 2x +3.

If you still don't get it, let me know I'll post a screenshot.

I get! Thanks a lot man!

 

[LMGD33]

Hey, you switched your axis! You put the imaginary one in the real one!

OMGG THAT EXPLAINS IT ALL!!
When I add ninety degrees because now the Angle is in the second quadrant I get the right answer! Thanks!!

 

[Ashique]

InshaAllah

What's driving me insane is, what in the world were they thinking sticking maths and chemistry in one day? And Stats and physics p4 two days later? They're HUGE papers- it's like they WANT us to do bad.

This meme makes SO much sense now:

 

[50sum]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w10_qp_33.pdf

please help me in detail with 10 (2) b, where we have to find 6 roots. I don't understand what the mark scheme says.

 

[applepie1996]

What's driving me insane is, what in the world were they thinking sticking maths and chemistry in one day? And Stats and physics p4 two days later? They're HUGE papers- it's like they WANT us to do bad.

This meme makes SO much sense now:

I KNOW RITE !!!
i am sleep deprived
you know CIE ! always in the torturing mood xD
its like they get peace when they see us in pain xD

 

[waver525]

Ashique PLS HELP ME WITH THIS ONE

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w10_qp_33.pdf
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w10_ms_33.pdf

 

[iKhaled]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w10_qp_33.pdf

please help me in detail with 10 (2) b, where we have to find 6 roots. I don't understand what the mark scheme says.

i have a feeling a question of this type is coming tomorrow..pls can someone fully explain it question 10 second part

 

[MustafaMotani]

i have a feeling a question of this type is coming tomorrow..pls can someone fully explain it question 10 second part

this is functions bro ....
P(x) = x^2 + 2x +3
P(1) = 1 + 2 + 3 = 6
p(x^2) = (x^2)^2 + 2 (x^2) + 3


now try to do that question
hope yu get it . ....

 

[minie23]

t

the easier the harder to ace to harder the easier to ace

The paper being too hard is not so good sometimes !
Because in the exam hall, you might get confused and you are stressed ! Then, you start messing around ! :s

 

[LindaKim123]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_31.pdf
question 7 i) please!!!

 

[Sanis]

w= -1 + i (on diagram (-1,1))
w^2 = -2i (on diagram (0,-2))

midpoint = ((-1+0)/2, (1-2)/2)
(-1/2 , -1/2) = -0.5 -0.5i

Thanks A lot man .. it helped

 

[Khalid Mohammed Okiely]

Hi all, I would please like to know the solution of question 4 in this paper. I just reached that point where I should leave the question or I will cause myself problem. Thanks in advance

 

[iKhaled]

The paper being too hard is not so good sometimes !
Because in the exam hall, you might get confused and you are stressed ! Then, you start messing around ! :s

yeah ik but being so easy is the worst because i am one of these dudes who can make so many silly mistakes because of exam stress lol

 

[iKhaled]

this is functions bro ....
P(x) = x^2 + 2x +3
P(1) = 1 + 2 + 3 = 6
p(x^2) = (x^2)^2 + 2 (x^2) + 3


now try to do that question
hope yu get it . ....

no bro i didn't get it :/ can u show the solution of this question..only the last part pls

 

[MustafaMotani]

no bro i didn't get it :/ can u show the solution of this question..only the last part pls

were yu able to do first part .. ?

 

[iKhaled]

were yu able to do first part .. ?

yes i got all of the question but i don't know how to deal with the 6 roots thingy i cant get this question

 

[MustafaMotani]

yes i got all of the question but i don't know how to deal with the 6 roots thingy i cant get this question

ohkay makes my work easy wait ..

 

[minie23]

yeah ik but being so easy is the worst because i am one of these dudes who can make so many silly mistakes because of exam stress lol

Agreed ! same here !
Lets hope the paper gonna be average, Insha Allah !

 

[iKhaled]

ohkay makes my work easy wait ..

thanks man!!

 

[biba]

Hi all, I would please like to know the solution of question 4 in this paper. I just reached that point where I should leave the question or I will cause myself problem. Thanks in advance

cosec2@ = sec@ + cot @
so,
1/sin2@ =(1/cos@) + (cos@/sin@)
1/sin2@ = (sin@ + cos^2@)/(cos@sin@)
1/sin2@ = [sin@ +(1- sin^2@)]/ (cos@sin@)
1/sin2@ = (sin@+1- sin^2@)/(cos@sin@)
i am multiplying right hand side with (2/2) so,

1/sin2@ = 2(sin@+1-sin^2@)/2sin@cos@
1/sin2@ = 2(sin@+1-sin^2@) / sin2@
sin2@ gets cancelled out therefore we are left with:
1 = 2(sin@+1-sin^2@)
1 = 2sin@ +2 - 2sin^2@
2sin^2@ - 2sin@ -1 = 0
now u can find the angle