Mathematics: Post your doubts here!

[syed1995]

I'm getting the concept now..

Thanks a lot for giving your time man

no problem mate.

 

[istudent]

I doubt your question. Are you sure there are no powers in there?

2 is power in expression
it is 9709/01 may june 2007 q3

 

[istudent]

What is MF9????????

 

[syed1995]

What is MF9????????

http://papers.xtremepapers.com/CIE/...d AS Level/Mathematics (9709)/9709_y13_sy.pdf

Page No. 33 or Section 6 from the syllabus above .. that's MF9 .. but i'd suggest that you memorize all the formulae and only rely on the Normal Distribution Table for statistics so that you may save your time ..

 

[syed1995]

I need urgent help please q1 how did we get a variance of 96 ??!!!
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s05_qp_1.pdf

p = 2/5
q = (1-p) = 3/5
n =400

Variance = npq = 2/5 * 3/5 * 400
Variance = 96

 

[ahmed abdulla]

can any one solve qn 9 b (ii) ... ???
http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w10_qp_13.pdf

 

[immie.rose]

can any one solve qn 9 b (ii) ... ???
http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w10_qp_13.pdf

from part(i) a=100, d=-5.
Sm=Sm+1 (given)
=> m/2(200+(m-1)-5)= m+1/2(200+(m+1-1)-5)
the only thing you could possibly cancel out here is the 2 in both the denominators, so do that.
now, m(200-5m+5)=m+1(200-5m)
-5m^2+200m+5m=200m-5m^2+200-5m
Clearing up, 10m=200
therefore, m=20.

 

[Manobilly]

Ye

i wanted to know that do we get a formula sheet during the exam of mathematics in AS levels!!!

Yes ofcourse !

 

[A star]

depends on u... i loved p3 as compared to s1.
ii gave accelerated... and u wont guess.... with s2
got a b :/
and that also after only two months study of s2

hmm i thought og giving accel and i think s1 is enough of a threat i wouldnt risk with s2 . hmm the other grades would have covered up i guess

 

[VelaneDeBeaute]

unseen95 Here's the answer to your query of M/J/12/33 Q.5.(ii)

 

[tanmaydube]

Anyone part (i) please

Thank you!

 

[applepie1996]

View attachment 23651

Anyone part (i) please

Thank you!

ummmm okay i shall try

 

[applepie1996]

View attachment 23651

Anyone part (i) please

Thank you!

its quite simple
all you need to know are the basic concepts like cos (A - B)= cos A cos B + sin A sin B
and cos (A + B)= cos A cos B - sin A sin B
soooo
cos (3x-x) = cos3x cosx - sin3x sinx
cos (3x + x) = cos3x cosx + sin 3x sinx
now you subtract these two and get 2sin3x sinx
divide it by 2
and wallah you get the answer sin3x sinx

 

[tanmaydube]

Thanks a lot applepie1996 could you do the (ii) part please

 

[unseen95]

unseen95 Here's the answer to your query of M/J/12/33 Q.5.(ii)
View attachment 23649

thank you very much

 

[applepie1996]

Thanks a lot applepie1996 could you do the (ii) part please

oh that
just replace sin3x sinx with 1/2(cos2x-cos4x)
and integrate it

 

[ahmed abdulla]

CHALLENGING QUESTION !!!

i think this question is GOING to come this year and i am 100 % sure !!
so any help ???

A ball is dropped froma height of 2m above a hard floor.
After each bounce , a ball rises to 3/4 of its previous height.

(a) how far has it travelled in total when strikes the ball for the nth term?
(b) show that the ball never travels more than 14 m in total .

i tried my best but never got it !

(a) ans is 14 - 16 * 0.75 ^n metre

 

[applepie1996]

CHALLENGING QUESTION !!!

i think this question is GOING to come this year and i am 100 % sure !!
so any help ???

A ball is dropped froma height of 2m above a hard floor.
After each bounce , a ball rises to 3/4 of its previous height.

(a) how far has it travelled in total when strikes the ball for the nth term?
(b) show that the ball never travels more than 14 m in total .

i tried my best but never got it !

(a) ans is 14 - 16 * 0.75 ^n metre

are you sure this is the question ?
maybe you are missing something
cause you can't just get 14 and 16 in the answer when the height is only 2m !

 

[SB29597]

Hi.

A curve C has the equation

a) (i) Show that:

(ii) Hence find the coordinates of the stationary point on the curve C
(iii) Show that this stationary point is a point of inflection.

 

[syed1995]

CHALLENGING QUESTION !!!

i think this question is GOING to come this year and i am 100 % sure !!
so any help ???

A ball is dropped froma height of 2m above a hard floor.
After each bounce , a ball rises to 3/4 of its previous height.

(a) how far has it travelled in total when strikes the ball for the nth term?
(b) show that the ball never travels more than 14 m in total .

i tried my best but never got it !

(a) ans is 14 - 16 * 0.75 ^n metre

Mechanics?