Mathematics: Post your doubts here!

[Lostsoul]

We dont get the course books ANYWHERE in Tanzania. Have tried my best since I tried my A Levels

 

[Rutzaba]

Yes,please aage bhi kardo...
Nahin samj ae :/

let u^2 =x
that means dx/du =2u that means differentiating u^2 woth respect to u
dx= 2u du
next thing is to change limits...
if u^2 =x
when upper limit of x=p^2 then replace x with p^2
u^2 = p^2
new upper limit =p
and since o will remain o
the new limits are p and o

then u have to integrate cos of root of u^2
root will cut the sqr u will get
integral of cos u dx
now look at the third line of this solution u will find dx= 2u du
integral of cosu 2u du for the limit p and 0
integrating by parts
u= 2u dv= cos u
u'=2 v= sinu
2u sin u- integral of 2sin u
2usinu -( -2cosu)
2usinu + 2cos u... apply limits p and 0
2p sinp + 2cosp - ( o +2 cos0)
2psin p +2cosp -2(1)=1 as this is also equal to the area of the shaded region...
2p sinp= 3-2cosp
sinp= 3-2cosp / 2p

 

[daredevil]

Ye media fire wala doc load nahi ho raha Rutzaba

 

[Rutzaba]

Ye media fire wala doc load nahi ho raha Rutzaba

us mai wahi likhe hai jo tum ne kia hai so dun wrry

 

[Rutzaba]

http://www.scribd.com/doc/195405528/Redspot-Books-Past-Year-Papers

 

[CЯeScɘnt]

itallion stallionSalmanPakRocks

complete it urself, sirf solving reh gae hae

 

[saadgujjar]

plz explain q 3(ii)....i dont know any formula of solving this...if possible plz share any link
and also explain q4 (iii)

 

[Rutzaba]

PLEASE DON POST PICTURES AND GIVE US THE WHOLE LINKS THANK YOUUUU

 

[daredevil]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_32.pdf

Q9 .... part ii

How do we integrate that?

 

[f_m_r]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_61.pdf

Q5/ i
someone plz help me on this, with working. i can't get the probability of success right.

 

[Rutzaba]

sumone solve this please im too tired 7ii
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_33.pdf

 

[_Ahmad]

anyone here for statistic S1

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s13_qp_61.pdf

Q5/ i
someone plz help me on this, with working. i can't get the probability of success right.

you have total of 15 number between 7 and 21 inclusive and only 3 of this numbers are multiples
so 3/15

 

[ZaqZainab]

anyone here for statistic S1

yup me

 

[saadgujjar]

plz explain q 3(ii)....i dont know any formula of solving this...if possible plz share any link
and also explain q4 (iii)View attachment 42598

plz reply

 

[ZaqZainab]

plz explain q 3(ii)....i dont know any formula of solving this...if possible plz share any link
and also explain q4 (iii)View attachment 42598

well there is no formula
they have given you
sum of (x-45)=-148 and sum of (x-45)^2=3089
you have 36 values
but now they added 1 other value which is 29
so that makes it -148-45+29
as for the square 3089+(-45+29)^2

 

[_Ahmad]

yup me

A general question.
In CF questions they give data in a table as (x < 40 or <10 or as ≤100)
For finding mean we need to convert this data into a interval which will start sometimes from (0-9) or (1-9)
so can u please tell when to start from 0 and when from 1

Hope you got my question
if you need some questions I can send you link

 

[ZaqZainab]

A general question.
In CF questions they give data in a table as (x < 40 or <10 or as ≤100)
For finding mean we need to convert this data into a interval which will start sometimes from (0-9) or (1-9)
so can u please tell when to start from 0 and when from 1

Hope you got my question
if you need some questions I can send you link

tbh i didnt get it what do you mean by (0-9)??
a question would be better

 

[_Ahmad]

ZaqZainab

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s13_qp_63.pdf Q6 (iii)
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_63.pdf Q3 (iii)
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_61.pdf Q6 (iv)

In these above listed questions for finding mean we make intervals. So can you please tell how to make intervals in these questions.

 

[saadgujjar]

well there is no formula
they have given you
sum of (x-45)=-148 and sum of (x-45)^2=3089
you have 36 values
but now they added 1 other value which is 29
so that makes it -148-45+29
as for the square 3089+(-45+29)^2

still don't understand...can u solve it on paper and send photo plz?explain the other question also