Mathematics: Post your doubts here!

[hassam]

yea 32 As the series is infinite it can only converge if -1 < x < 1

By the ratio test, it follows that the series converges for |x|<1, diverges for |x| > 1.​

 

[smzimran]

yea 32

Best of luck!

 

[zarasattar]

Have you expanded cos(3x − x) and cos(3x + x) ???

yep i have!

 

[smzimran]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_31.pdf
Q8. got the first part..plz explain ii and iii..pleaseee.

http://www.xtremepapers.com/community/attachments/sketching-argand-diagrams-2-pdf.6340/
Have you seen these ?

 

[Mustehssun Iqbal]

I could easily figure out which to take as u
I solved ten years papers never had any problems!
Thats great iam happy you had this 'honour'

xD
Figuring it out?? That sounds really pro brother, MashAllah.

 

[zarasattar]

Have you expanded cos(3x − x) and cos(3x + x) ???

oh wait, i think i know how to do it

 

[smzimran]

yep i have!

Substitute cos(3x − x) in place of cos2x and cos(3x + x) in place of cos4x​

 

[hassam]

yea 32 As the series is infinite it can only converge if -1 < x < 1

By the ratio test, it follows that the series converges for |x|<1, diverges for |x| > 1.​

i read this from forums.....now having read tthis ......do u get any idea on validity cos i dint still get it why we wud want it to cnverge or diverge

 

[smartangel]

http://www.xtremepapers.com/community/attachments/sketching-argand-diagrams-2-pdf.6340/
Have you seen these ?

no..im just checking it out and i'll see if it answers my question.. also one more thing do we have to roughly sketch argand diagrams or does it have to be proper..like radius and all? and is it on our answer booklet or graph paper?

 

[smzimran]

smartangel and 1357913579:

smartangel:
No accuracy is not needed, its just 'SKETCHING'

 

[Mustehssun Iqbal]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_31.pdf
Q 10 b please!

Ooh. Apologies. I misread your post. :/
I want the solution to that question too....

 

[smzimran]

Ooh. Apologies. I misread your post. :/
I want the solution to that question too....

Ohk, i'll solve it!

 

[zarasattar]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s10_qp_31.pdf
Q 7 iii ?

 

[smzimran]

zarasattar and Mustehssun Iqbal:

 

[zarasattar]

zarasattar and Mustehssun Iqbal:
View attachment 9720

Thanks!

 

[smartangel]

does anyone have all the trignometric graphs? and exponential graphs as well?

 

[Mad-Eye]

A 'Permutation and Combination' problem
Eight cards are selected from a pack of 52 cards, with 12 picture cards, 20 odd cards and 20 even cards.
How many sequences of eight cards will contain 3 picture cards, 3 odd numbered cards and 2 even numbered cards??

 

[hassam]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_32.pdf​

q10 part 3​

 

[hassam]

A 'Permutation and Combination' problem
Eight cards are selected from a pack of 52 cards, with 12 picture cards, 20 odd cards and 20 even cards.
How many sequences of eight cards will contain 3 picture cards, 3 odd numbered cards and 2 even numbered cards??

yar p3 ka paper hay aaj

 

[user]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_32.pdf​

q10 part 3​

Assalamoalaikum wr wb!

now if the tangent passes through the origin [and since it's a straight line..] the eqn of the tangent will be in the form y= mx where m is the gradient and therefore dy/dx

solve this equation and the equation of the curve simultaneously and find x