Mathematics: Post your doubts here!

[awesomaholic101]

Tysm

 

[Sarosh Jameel]

y'= -e^p + e^p(4-p) = y2 - y1/ x2 - x1 ( gradient formula)
= (4-p)e^p - 0/ p - 0
-p^2+4p-4=0
p=2

Thanks a lot !

 

[eliyeap]

These questions are from cie m/j 2013 32

 

[Farhad221]

You the MAN!!!!!!!!!!!!!. Thanks alot.

 

[psychiatrist]

I think the question is wrong?

I hope the same, can u answer my question...
What will my grade be if my score in P12 is 68 and P62 30 ??
Acc to this GT

 

[Farhad221]

If its not too much trouble can u explain to me the last question.

 

[Sarosh Jameel]

PLZZ help me with this !!!

 

[Farhad221]

PLZZ help me with this !!!

USE first differnetiation to find to stationary points the use second drevaite to find which is maximum and minimum.

 

[eliyeap]

I hope the same, can u answer my question...
What will my grade be if my score in P12 is 68 and P62 30 ??
Acc to this GT
View attachment 57202

My guess is a B but it really depends on the grade threshold that year. I calculated 75, so if its a hard year where everybody does badly, you might get an A or a C if the year was easy

 

[eliyeap]

If its not too much trouble can u explain to me the last question.

which part dont you understand?

 

[Farhad221]

which part dont you understand?

How did u devise the vector (1, b,c).

 

[eliyeap]

PLZZ help me with this !!!

y = (1/2)e^2x - 5e^x + 4x
y' = e^2x - 5e^x + 4
Factorise ( e^x-4) (e^x-1)=0
e^x=4 e^x=1
x=ln4 x=ln1=0
y''= 2e^2x - 5e^x
Then just sub in your values to find max or min

 

[psychiatrist]

My guess is a B but it really depends on the grade threshold that year. I calculated 75, so if its a hard year where everybody does badly, you might get an A or a C if the year was easy

What is this 75
And arent grade threshold set according to the performances of candidates over the world??

 

[eliyeap]

How did u devise the vector (1, b,c).

Plane q contains the line AB. Normally to show if a plane contains a line we assume that there are common points on l and plane, in this case point A and B.
But they already gave us point A and B so just make use of it. Sorry, I dont really know how to explain it to you.

 

[Farhad221]

Plane q contains the line AB. Normally to show if a plane contains a line we assume that there are common points on l and plane, in this case point A and B.
But they already gave us point A and B so just make use of it. Sorry, I dont really know how to explain it to you.

Ok i got it. thank you very much. Off the topic though, hows ur prep for maths cuz as i saw your work, damn that was some good stuff

 

[eliyeap]

What is this 75
And arent grade threshold set according to the performances of candidates over the world??

For math: (68/75)*50= 45.33
Total= 45.33+30 = 75.33
You can calculate your own total what. And yes grade threshold depends on the whole world. If in the exam you score this mark for a easy exam, the grade will be a B i guess. However, if almost all candidates had a though time, then they will lower the threshold and you might get a low a

 

[psychiatrist]

For math: (68/75)*50= 45.33
Total= 45.33+30 = 75.33
You can calculate your own total what. And yes grade threshold depends on the whole world. If in the exam you score this mark for a easy exam, the grade will be a B i guess. However, if almost all candidates had a though time, then they will lower the threshold and you might get a low a

what is low a

 

[eliyeap]

Ok i got it. thank you very much. Off the topic though, hows ur prep for maths cuz as i saw your work, damn that was some good stuff

Welcome. And yeah progress is painfully slow and torturing.

 

[eliyeap]

what is low a

80-85?

 

[Farhad221]

what is low a

Around 81 82 percentile