Maths, Addmaths and Statistics: Post your doubts here!

[Suchal Riaz]

I am not studying add maths

u r lucky that thought of choosing add maths did not occur to u.

 

[Executor]

AOA,
Please spare few minutes and go to this thread http://www.xtremepapers.com/community/threads/dua-for-all-candidates.14272/ and make dua for all those currently appearing in the exams. You will also find useful duas in it and Remember every share counts.

 

[TheStallion-Reborn]

the line x=y means that at any given point x=y. and the line bisects the grid squares it passes through. right? now what is y=-x??

 

[usama321]

the line x=y means that at any given point x=y. and the line bisects the grid squares it passes through. right? now what is y=-x??

https://docs.google.com/file/d/0B5fa5e3Ovxq3bFRUUktHM3ZUNkk/edit?usp=sharing

 

[TheStallion-Reborn]

http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_s04_qp_2.pdf question 5 part c.. da concept to be applied is??

 

[Kamihus]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s04_qp_2.pdf question 5 part c.. da concept to be applied is??

In part (i) the x will be minimum when y will be zero.
80 +35-x=100
x=15
part (ii) y will be maximum when all the students studying french also study spanish
therefore, y+(80-35)+35+(35-35)=100
y=20

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s04_qp_2.pdf question 5 part c.. da concept to be applied is??

for x to be greatest y has to be least, or zero. so y=0, therefore x+80-x+35-x=100, x=15
for y to be greatest the x should be greatest. x can not be greater than 35 otherwise n(F) will be negative, so when x=35, 80+y=100. y=20.

 

[usama321]

http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_s03_qp_1.pdf

q16 part c. I don't have a clue about describing locus in three dimensions. Can anyone pls give some notes, or help me with it?

 

[TheStallion-Reborn]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_qp_1.pdf

q16 part c. I don't have a clue about describing locus in three dimensions. Can anyone pls give some notes, or help me with it?

it's gona b a parallel line.. idk how r v gona describe it..

 

[HarithAslam]

Why is everyone posting the calculator version CIE?
Isnt it syllabus D in Pakistan?

 

[HarithAslam]

and how to find the velocity vector if the speed is 20km/h and direction 3i+4j Suchal Riaz usama321

I figured a way to do these kind of questions.
So unit vector in direction 3i+4j= (1/5)(3i+4j)
velocity vector= 20(1/5)(3i+4j)= (12i+16j) km/h
hoped this helped you

 

[usama321]

it's gona b a parallel line.. idk how r v gona describe it..

the mark scheme says its gonna be a cylinder with two hemispeheres at the sides, and i kinda understand that. but i am worried if a different type of question comes in the exam.

p.s the question asks in three dimensions, so you can't say parallel lines

 

[TheStallion-Reborn]

the mark scheme says its gonna be a cylinder with two hemispeheres at the sides, and i kinda understand that. but i am worried if a different type of question comes in the exam.

p.s the question asks in three dimensions, so you can't say parallel lines

r locus in 3 dimensions in our syllabus??

 

[usama321]

r locus in 3 dimensions in our syllabus??

yup i have seen some rare questions, but yeah they seem to be in the syllabus

 

[asma tareen]

the mark scheme says its gonna be a cylinder with two hemispeheres at the sides, and i kinda understand that. but i am worried if a different type of question comes in the exam.

p.s the question asks in three dimensions, so you can't say parallel lines

tag me if u got the answer

 

[asma tareen]

http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_s04_qp_2.pdf
HELP
Q6 LAST PART

 

[usama321]

http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_s03_qp_2.pdf

q7 part A. anyone please?

 

[asma tareen]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_qp_2.pdf

q7 part A. anyone please?

HAVE U TRIED USING FORMULA I/2(Pi*R*H) + 1/2(2*pi*r2) + pi*r2???

 

[usama321]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s04_qp_2.pdf
HELP
Q6 LAST PART

for length of 6m, we put 6 in nth terms of both rods and bolts. For rods, 7*6-1 = 41 rods
for bolts 3*6+2= 20

now we need 20 bolts and 41 rods for every fence. divide 200/20 and we get 10, so we have bolts for 10 fences.

Now divide 400/41 and we can't get more a whole number. this means we have rods for only 9 fences.

So, we can't make more than 9 fences

 

[HarithAslam]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_qp_2.pdf

q7 part A. anyone please?

is this 'calculator version' mathematics included? because dont we take mathematics syllabus D?