Mathematics: Post your doubts here!

[TaffsAsLevel]

you did everything correct except you have to subract x=1+s with -3 as shown in the question (r-3i) which means r has to subtracted from vector (3,0,0) j and k are zero in this case

Thank you dear

 

[xhizors]

jazakAllah sis!

 

[xhizors]

Esme
Q2,
Q5(iv)
Q10(i,ii)
Please can u share your working!
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_31.pdf

 

[D0cEngi]

Plz anyone help me with ques no 6 part (i) of this paper : http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w09_qp_32.pdf

 

[applepie1996]

Esme
Q2,
Q5(iv)
Q10(i,ii)
Please can u share your working!
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_31.pdf

question 2 ) 5^(x-1) = 5^x - 5
now take the 5^(x-1) on the right side and the -5 to the left side so that all the x's are on one side
now you get 5=5^x-5^(x-1)
open up 5^(x-1) you get 5^x * 5^-1 substitute this in equation
take 5^x as a common factor
5=5^x(1-5^-1)
5/(1/5^-1)=5^x
log 6.25 = x log 5
x=1.14

 

[iKhaled]

I got the diameter and radius... I was wondering how would we find out the mid- point and I just understood!! We had to use the coordinate geometry formula for mid-point of the two points! Can't believe I didn't think of that before ! Thank you soo much. May Allah bless you and grant you success in this life and in the Hereafter

ohh dat was easy ! i totally forgot that haha

 

[applepie1996]

Esme
Q2,
Q5(iv)
Q10(i,ii)
Please can u share your working!
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_31.pdf

question 5 part 4
you have to integrate 2sec^2x -1 +2secxtanx
after integrating this you get 2 tanx -x + 2 secx
put in the limits >>>> 2tan(pi/4)-(pi/4)+2sec(pi/4) - (2tan0-0-2sec0)
=2-pi/4+2sqrt2-2
=2sqrt2-pi/4
take 1/4 as a common factor and you get 1/4(8sqrt2-pi)

 

[xhizors]

question 2 ) 5^(x-1) = 5^x - 5
now take the 5^(x-1) on the right side and the -5 to the left side so that all the x's are on one side
now you get 5=5^x-5^(x-1)
open up 5^(x-1) you get 5^x * 5^-1 substitute this in equation
take 5^x as a common factor
5=5^x(1-5^-1)
5/(1/5^-1)=5^x
log 6.25 = x log 5
x=1.14

brillilant and simply awesome, May Allah give you immense Success Ameen

 

[xhizors]

question 5 part 4
you have to integrate 2sec^2x -1 +2secxtanx
after integrating this you get 2 tanx -x + 2 secx
put in the limits >>>> 2tan(pi/4)-(pi/4)+2sec(pi/4) - (2tan0-0-2sec0)
=2-pi/4+2sqrt2-2
=2sqrt2-pi/4
take 1/4 as a common factor and you get 1/4(8sqrt2-pi)

what is the integral of 2secxtanx ?

 

[iKhaled]

what is the integral of 2secxtanx ?

dude the trick in that question is this part..if u check in the question it says if y = sec x then dy/dx is sec(x)tan(x) so i guess this just answered the question u have asked

 

[applepie1996]

what is the integral of 2secxtanx ?

its sec x

 

[kiara15]

For June 2012, p63, q3-
aaah thaaaank u so much for explaination, yeah i do understand, wil try to practise other,,, god bless abunduntly ameen... best guider ever seen!
p.s=if i got problems then i will ask fromm u, be ready heheh

 

[kiara15]

[quote="2,
thaaaaaaaaaaaank u so much once again, u guide very good...... thnkuu..... got very less time but atleast concept about these ambigous questions got clear! be blessed

god help those who help others

 

[kiara15]

does any body have MATHS P3 VECTORS notes ?? please i need help urgent ??

i need notes too

 

[Ashique]

Plz anyone help me with ques no 6 part (i) of this paper : http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w09_qp_32.pdf

Please do tell me if you didn't understand:

 

[Esme]

i need notes too

Check the previous posts, I and another member have posted them

 

[iKhaled]

hey how can i solve question 7(ii) oct/nov 2012 paper 33

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

 

[xhizors]

Please do tell me if you didn't understand:
View attachment 26398

lol i just end up solving for him

 

[xhizors]

dude the trick in that question is this part..if u check in the question it says if y = sec x then dy/dx is sec(x)tan(x) so i guess this just answered the question u have asked

hehe lol lol lol Thanks buddy

 

[kiara15]

Check the previous posts, I and another member have posted them

ok thaaank u, god bless u