Maths, Addmaths and Statistics: Post your doubts here!

[Suchal Riaz]

You didn't read the question, did you?
It's f' not f inv.

if f-inv(1/2)=0 then f(0)=1/2
isn't it?

 

[Saad Mughal]

if f-inv(1/2)=0 then f(0)=1/2
isn't it?

The question says that it is a factor of f' and f not f inv. and f.
There is a difference in both of them.
f' is the differential of f.
f inv. is the inverse of f.

 

[Suchal Riaz]

The question says that it is a factor of f' and f not f inv. and f.
There is a difference in both of them.
f' is the differential of f.
f inv. is the inverse of f.

DAFUQ!
I knew my mind had some malfunction. i read fprime and write f inverse! btw thanx for pointing it out

 

[Saad Mughal]

DAFUQ!
I knew my mind had some malfunction. i read fprime and write f inverse! btw thanx for pointing it out

Its good that you actually know what f' means. One of my seniors did a mistake with this last year.

 

[Suchal Riaz]

Its good that you actually know what f' means. One of my seniors did a mistake with this last year.

man i know what f' is from my first lesson on khan academy
it was just a brain malfunction, and if luck did not allow it to happen in examination i m sure i can get distinction. but my mind never get satisfied unless it makes atleast one silly mistake in a paper.

 

[Saad Mughal]

man i know what f' is from my first lesson on khan academy
it was just a brain malfunction, and if luck did not allow it to happen in examination i m sure i can get distinction. but my mind never get satisfied unless it makes atleast one silly mistake in a paper.

It's MATHS, you're always very close yet too far away.

 

[Suchal Riaz]

It's MATHS, you're always very close yet too far away.

there is NO WAY a person does not get 100% but if he makes mistakes

 

[Saad Mughal]

there is NO WAY a person does not get 100% but if he makes mistakes

Well, to be honest, I usually complete the paper with 15-20 minutes remaining. That means I can check my paper and go through the answers and search for mistakes (but in school and mocks I slack off and don't do it), so yeah, 100% can be achieved.

 

[Suchal Riaz]

Well, to be honest, I usually complete the paper with 15-20 minutes remaining. That means I can check my paper and go through the answers and search for mistakes (but in school and mocks I slack off and don't do it), so yeah, 100% can be achieved.

i m too lazy to check. last year i looked here and there and did not check paper still got highesr grades. straight A*s

 

[Saad Mughal]

i m too lazy to check. last year i looked here and there and did not check paper still got highesr grades. straight A*s

I do the same, I'm just eager to give the paper away.

 

[Haris Bin Zahid]

I have a query.
Suppose in the relative velocity question, the final bearing we find is 245.0473839 degrees.
Are we supposed the write our answer as 245 degree or 245.0 degree?
Confused

 

[falcon678]

I have a query.
Suppose in the relative velocity question, the final bearing we find is 245.0473839 degrees.
Are we supposed the write our answer as 245 degree or 245.0 degree?
Confused

dude depends on the angles givn in question and whethr the question has specified decimal num or no!

 

[Saad Mughal]

I have a query.
Suppose in the relative velocity question, the final bearing we find is 245.0473839 degrees.
Are we supposed the write our answer as 245 degree or 245.0 degree?
Confused

As far as I know, bearings are always 3 digit, for e.g. 070 degree, 275 degree. All other angles are to 1 decimal point and all other numbers are to 3 significant figures.

 

[papajohn]

Lol. People don't know that we don't discuss maths. Spare them.

Me and Suchal only discuss Add.maths. Maths is too easy.

Dude Maths is much difficult than Add Math

 

[Saad Mughal]

Dude Maths is much difficult than Add Math

Lol, not for me. Maths doesn't have relative velocity, integration or permutation (which attract mistakes). Maths just needs to be done sensibly!

 

[falcon678]

Dude Maths is much difficult than Add Math

Add maths is a levels maths acutaly...!

 

[papajohn]

Lol, not for me. Maths doesn't have relative velocity, integration or permutation (which attract mistakes). Maths just needs to be done sensibly!

Yeah man..I agree with that but u cannot also ignore that Math is hard. This is also equally harder.

 

[Suchal Riaz]

Yeah man..I agree with that but u cannot also ignore that Math is hard. This is also equally harder.

can u tell me any topic in maths which is as difficult as permutation/combination, relative velocity and long 6-9 marks coordinate geometry questions.

 

[Saad Mughal]

Yeah man..I agree with that but u cannot also ignore that Math is hard. This is also equally harder.

I agree with falcon678 here, Add.maths is the maths of A'levels (simplified), that's why it is important for engineering students to take it. Maths and Add.maths only seem hard if you lack practice. Practice does wonders in ANY subject, so it's all about determination.

 

[nidz]

show me how u did, 5 people on XPC and my teacher did it and all of us got 1/4

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