Mathematics: Post your doubts here!

[MustafaMotani]

Thank you! This was a lot of help
Should I know all mensuration formulas? :/

yah ..

 

[MustafaMotani]

MustafaMotani can you please summarize some formulas for each different cases of vector question, like when plane is perpendicular to one line.. and other complicate situation? I kept on trying to understand the question, but I always got confused at deciding each formula I should use..

I am not the ryt guy to do that..
I just visualise situations of draw them to understand what is going on in vectors question and then act accordingly..

 

[Anika Raisa]

Okay, I was also actually stuck in the same question but someone who has also been participating in this thread had offered to help me out. Unfortunately, for me and my silly brain, I can't quite remember who had helped me So please forgive me if you are reading this right now, anonymous helper.
But I have saved the picture he/she had sent me of the solution to this question
I'll attach the solution here.
https://www.xtremepapers.com/community/attachments/w_12_qp33-q4-jpg.26305/

Thnx lot !!! i hv been stuck on this 4 ages!! n yes ur brain isnt silly its only u r burdened! So yeah thanx to both of you!!!

 

[Anika Raisa]

Okay, I was also actually stuck in the same question but someone who has also been participating in this thread had offered to help me out. Unfortunately, for me and my silly brain, I can't quite remember who had helped me So please forgive me if you are reading this right now, anonymous helper.
But I have saved the picture he/she had sent me of the solution to this question
I'll attach the solution here.
https://www.xtremepapers.com/community/attachments/w_12_qp33-q4-jpg.26305/

Thnx lot !!! i hv been stuck on this 4 ages!! n yes ur brain isnt silly its only u r burdened! So yeah thanx to both of you!!!

 

[SararaIH]

yah ..

Another load to put on my shoulders

Thanks for your help though!

 

[Anika Raisa]

OMG, someone please help me out in question 2- http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w12_qp_32.pdf

Hope this helps!!!

 

[SararaIH]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_32.pdf
I need help with the full working of Q8i

 

[Esme]

OMG, someone please help me out in question 2- http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w12_qp_32.pdf

5^(x-1) = 5^x - 5
(5^x)/5 = 5^x - 5
Take 5^x = u
u/5 = u - 5
u= 5u - 25
u=25/4

5^x = 25/4
And so x = 1.14

 

[Silent Hunter]

How to continue further from here ? : (may be something very basic...... but its not coming into ma mind right now :\ )



its q4 of http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_33.pdf

Rutzaba
Esme
applepie1996

or anyone ?

 

[Rutzaba]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_31.pdf

Need help with question 9



Tan(x/2) integrates to -ln(cos(x/2))

http://i1275.photobucket.com/albums/y444/Rutzaba/maths_zps139585a6.png

 

[Rutzaba]

How to continue further from here ? : (may be something very basic...... but its not coming into ma mind right now :\ )

View attachment 26601

its q4 of http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_33.pdf

Rutzaba
Esme
applepie1996

or anyone ?

=

How to continue further from here ? : (may be something very basic...... but its not coming into ma mind right now :\ )

View attachment 26601

its q4 of http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_33.pdf

Rutzaba
Esme
applepie1996

or anyone ?

convert everything to ln
lny= ln(x^2 +4)^3 +ln32 -ln4^3
got it?

 

[Silent Hunter]

=
convert everything to ln
lny= ln(x^2 +4)^3 +ln32 -ln4^3
got it?

yeah tried that : but the MS says something else : http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_ms_33.pdf

 

[Rutzaba]

yeah tried that : but the MS says something else : http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_ms_33.pdf

han na
tou wo is ke bad ka step hai..
in log jub minus hota hai to divide hota hai...
han ye question i remember its wrong in the ms

 

[LMGD33]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_32.pdf
I need help with the full working of Q8i

Sorry i skipped the part where i got the limits.. you just substitute x = 5 and x = 2 in u = sqrt (6- x) to get 2 and 1 respectively, but since they asked us to flip the limits, we multiply the entire integrand by -1 thus getting rid of the - 10 u !!
Good luck!

 

[VinnCh]

Hello , is there any kind soul out there who can help me with Q7 (ii) ? I don't know how to solve it. 9709_s11_qp_32

 

[LMGD33]

Hello , is there any kind soul out there who can help me with Q7 (ii) ? I don't know how to solve it. 9709_s11_qp_32

Hello. I solved it long ago, and i'm checking my copybook, I hope you solved part (i) correctly.. when you sketch it, you have the angle and the opposite side is (10/a^2 +4) and the adjacent side is (5a/a^2 + 4) so to find the tan of the angle which they provided, you need to write tan(3pi/4) = opp/adj
This gives : tan (3pi/4) = 10/5a
[shift] tan(3pi/4) = 10/5a
-1 = 10/5a
a= -2
Good luck!!

 

[Anika Raisa]

Solutions to P3 paper 33 year may/june 2012!

 

[applepie1996]

han na
tou wo is ke bad ka step hai..
in log jub minus hota hai to divide hota hai...
han ye question i remember its wrong in the ms

explaining math in urdu
hahaha xD just makes it more complicated

 

[LMGD33]

Solutions to P3 paper 33 year may/june 2012!

THANK YOUUUU!!! OMG This is wonderful! Inshallah will help me tomorrow God bless you!

 

[SararaIH]

Sorry i skipped the part where i got the limits.. you just substitute x = 5 and x = 2 in u = sqrt (6- x) to get 2 and 1 respectively, but since they asked us to flip the limits, we multiply the entire integrand by -1 thus getting rid of the - 10 u !!
Good luck!

So after we integrate this completely, we still have to multiply the -1 at the end, right?