Maths, Addmaths and Statistics: Post your doubts here!

[Saad Mughal]

Derivative XDDD

*Suchal language for derivative.

 

[mohdumar]

*Suchal language for derivative.

LOLOLOL

 

[Snowysangel]

Find detovatove function to find tangent gradient, to find gradient of notmal, to find c, which was y coordinate of p.

I found the gradient of the tangent, and then I divided it by -1. I used the values at that point to find the equation of the normal, and then I put in x=0 in that equation to find the y coordinate of P..so where did I go wrong? :/

 

[Ishrar Afrida]

Q. 6(ii) How do you get x and y?

 

[Saad Mughal]

Q. 6(ii) How do you get x and y?

5^y/125^x-2 = 25
5^y/5^3x-6 = 5^2
Simplifying,
y - 3x + 6 = 2
y - 3x = -4
This is equation (ii). Simultaneously solve it with the one in part (i) to get x and y.

 

[redd]

Can anyone please help me with these two relative velocity questions, i brought about the answer but can get no logic. please help me with these.


http://papers.xtremepapers.com/CIE/...ematics - Additional (4037)/4037_s06_qp_1.pdf (question 3)

http://papers.xtremepapers.com/CIE/...matics - Additional (4037)/4037_s11_qp_21.pdf (question 9)

 

[simranlalchand]

can anyone answer this question
http://papers.xtremepapers.com/CIE/...matics - Additional (4037)/4037_w12_qp_22.pdf ( question number 7 part 3)

 

[Talha Irfan]

I did the same. But I don't get the logic of the multiplication.
The direction and Cartesian plane method is more logical.

can u give ur reply to that part (position vector at 15 00 hrs)

 

[robinhoodmustafa]

Can anyone please help me with these two relative velocity questions, i brought about the answer but can get no logic. please help me with these.


http://papers.xtremepapers.com/CIE/...ematics - Additional (4037)/4037_s06_qp_1.pdf (question 3)

http://papers.xtremepapers.com/CIE/...matics - Additional (4037)/4037_s11_qp_21.pdf (question 9)

Q3.
For Vw we need speed so Distance of the plane and time taken is given so take out the Speed.

We need to find Vp/w and Vw (speed of wind) is given

Construct the usual equation : Vp/w=Vp - Vw
(3) (1) (2)
Vw will be negative because the question clearly says the wind blow from South east not toward it.


Make the Relative diagram and use trigonometry formula's


and for the another paper. Refer 2003 june P1 q3

 

[Ahmed Ibrahim Juhas]

i have a question........in my o'level addmths exam yesterday i did a mistake in integration....i gave +c in bracket...like for instance the question asked to integrate X^2----i did it this way----X^3/3 (+c) ...will they cut any marks for this?? plz tell me i am very tensed about it??

 

[redd]

i have a question........in my o'level addmths exam yesterday i did a mistake in integration....i gave +c in bracket...like for instance the question asked to integrate X^2----i did it this way----X^3/3 (+c) ...will they cut any marks for this?? plz tell me i am very tensed about it??

no, inshaa Allah

 

[Saad Mughal]

can u give ur reply to that part (position vector at 15 00 hrs)

Question?

 

[mohdumar]

can anyone answer this question
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics - Additional (4037)/4037_w12_qp_22.pdf ( question number 7 part 3)

ans is 1/4. It was given wrong in markscheme. We had discussion on it long ago.

 

[Saad Mughal]

ans is 1/4. It was given wrong in markscheme. We had discussion on it long ago.

Yeah but actually, the question paper is wrong, not the mark scheme. The mark scheme is for the original 4037_22 paper whereas the range in this paper is not the same as the original paper. My source: Mock exam.

 

[mohdumar]

Yeah but actually, the question paper is wrong, not the mark scheme. The mark scheme is for the original 4037_22 paper whereas the range in this paper is not the same as the original paper. My source: Mock exam.

Ok, but cambridge did some serious b***shit here.

 

[Saad Mughal]

Ok, but cambridge did some serious b***shit here.

Don't they always?

 

[mohdumar]

Don't they always?

Yo.....

 

[AhsanAfzal]

how to make triangles for rv?? my triangles are mostly opposite to the ones in answer and bearing is always wrong

 

[Nabeel.Ahmad]

How to study Add-Maths? :/
Its hard.

 

[Nabeel.Ahmad]

And can maths teachers teach statistics as an o level subject?