Maths, Addmaths and Statistics: Post your doubts here!

[Saad Mughal]

Alright... Here you go...:


Integration of
(1 + sec2 4x) dx----> x+ tan 4x/4

For limit:  π/16

π/16 + 1/4 tan π/4 = π/16 +1/4

For limit: -π/16

-π/16 +1/4 tan -π/4 = -π/16 - 1/4

Subtracting both: [ π/16 +1/4] - [ -π/16 - 1/4]

= 2 π/16 + 1/2
π/8 +1/2 = 1/8 ( π + 4) ----- k= 1/8

You've taken the wrong limits, the limits are 5π/16 and π/16.

 

[nidz]

You've taken the wrong limits, the limits are 5π/16 and π/16.

They are π/16 and - π/16 in the paper. I have just seen it. :s

 

[nidz]

You've taken the wrong limits, the limits are 5π/16 and π/16.

The paper uploaded on this site and the one I downloaded are a bit different. And the only difference is in this part. Now that is weird

 

[Saad Mughal]

They are π/16 and - π/16 in the paper. I have just seen it. :s

http://papers.xtremepapers.com/CIE/...matics - Additional (4037)/4037_w12_qp_22.pdf
You might have been looking at the wrong paper.

 

[Saad Mughal]

The paper uploaded on this site and the one I downloaded are a bit different. And the only difference is in this part. Now that is weird

 

[Suchal Riaz]

The paper uploaded on this site and the one I downloaded are a bit different. And the only difference is in this part. Now that is weird

PlanetMaster the paper uploaded here has an error due to which everybody was getting wrong answer, nidz has pointed it out that real paper was different. Moreover the examiner reports for w11 are also not uploaded. please check it out. thanks in advance.

 

[Kamihus]

PlanetMaster the paper uploaded here has an error due to which everybody was getting wrong answer, nidz has pointed it out that real paper was different. Moreover the examiner reports for w11 are also not uploaded. please check it out. thanks in advance.

Here are all the examiner reports

 

[devindi abeysekara]

After the initiative taken by Math_angel in the IGCSE section, I have made this topic for students of O'levels. You can post any question or any problem here and me along with other XPF users will try to help you as soon as possible. This topic is a feasible option as it won't bring a hassle of making new topics for every question and it will also allow the helpers to not miss any of your questions and have one common topic for answering your Mathematics queries.

So start posting your problems.

hw can i download da maths marking shemes?? 4024 oct/nov 2012

 

[Zoya Shahab]

Without using a calculator, solve

 

[Zoya Shahab]

The polynomial x^4+4x^2+x+a is denoted by p(x). It is given that x^2+x+2 is a factor of p(x). Find the value of a and the other quadratic factor of p(x).

 

[nidz]

hw can i download da maths marking shemes?? 4024 oct/nov 2012

It's uploaded on the site. Or you can tell me which marking scheme you want and I'll post the link here

 

[Suchal Riaz]

The polynomial x^4+4x^2+x+a is denoted by p(x). It is given that x^2+x+2 is a factor of p(x). Find the value of a and the other quadratic factor of p(x).

divide x^4+4x^2+x+a by x^2+x+2 using algebraic long division or synthetic division. if u dont know how to do it, search for it on khanacademy.com

 

[Zoya Shahab]

divide x^4+4x^2+x+a by x^2+x+2 using algebraic long division or synthetic division. if u dont know how to do it, search for it on khanacademy.com

I tried that but got an unusual answer... Can u give me ur answer???

 

[sweetiepie]

1 Apply fundamental principle of proportion to find x when x/3 = 12/30
A 72
B 12.5
C 2
D 12

2 If (A – 3) : A = (A+6) : (A + 3), then A is

A -3/A
B -1/2
C -3/2
D -5/2

 

[sweetiepie]

Q. In any function there will be only one

A Independent variable
B Dependent variable
C Random variable
D None of these


Q. In any function there may be more than one

A Independent variable
B Dependent variable
C Random variable
D None of these

 

[sweetiepie]

Q. y=3x + 4 is an

A Explicit Function
B Implicit Function
C Constant Function
D Quadratic Function

 

[Saad Mughal]

Q. y=3x + 4 is an

A Explicit Function
B Implicit Function
C Constant Function
D Quadratic Function

A is the answer.

 

[Saad Mughal]

1 Apply fundamental principle of proportion to find x when x/3 = 12/30
A 72
B 12.5
C 2
D 12

2 If (A – 3) : A = (A+6) : (A + 3), then A is

A -3/A
B -1/2
C -3/2
D -5/2

Don't know about 1, but 2 is C.

 

[Saad Mughal]

Q. In any function there will be only one

A Independent variable
B Dependent variable
C Random variable
D None of these


Q. In any function there may be more than one

A Independent variable
B Dependent variable
C Random variable
D None of these

For first, B is the answer.
For second, A is the answer.

 

[Suchal Riaz]

I tried that but got an unusual answer... Can u give me ur answer???

the polynomial x²+x+2 has no real roots.
check did u typed the question right?