Mathematics: Post your doubts here!

[Suchal Riaz]

Can the co efficient of friction be greater than 1?
Our teacher said it can't be but in a past paper question the coefficient of friction is 1.62 so m a li'l confused :/
Suchal Riaz

It absolutely can be greater than 1. Coefficient of friction is actually tan of the angle of friction. And tan can be greater than 1.
In 2010 question it's value was 1.62. So it can be greater than 1. There is no reason why it can't be.

 

[A star]

whats the other value

-0.3something

 

[Aly Emran]

Oct nov 13 varient 32 question 3 and 4 :/ Aly Emran View attachment 39374

Im soo sorry i late but lemme tell u
Do it through integration by parts
Remember!!
Take ln x as first function

f= integration symbol

=fLnx*x^-1/2
=lnx*2x^1/2- 2f(x^1/2* x^-1)dx
Its too hard to type in math lang
I hope u can now do it from this point

Qstn 4 was hard i lost all marks cox of this :/

Do it like dx/dy and dy/dx
And then the product rule will be used
Sorry i cant type the long answer :/
Im using mobile :/

 

[Angelina_25]

Im soo sorry i late but lemme tell u
Do it through integration by parts
Remember!!
Take ln x as first function

f= integration symbol

=fLnx*x^-1/2
=lnx*2x^1/2- 2f(x^1/2* x^-1)dx
Its too hard to type in math lang
I hope u can now do it from this point

Qstn 4 was hard i lost all marks cox of this :/

Do it like dx/dy and dy/dx
And then the product rule will be used
Sorry i cant type the long answer :/
Im using mobile :/

Oww its okay Alo ....i got it nw !!!

 

[asma tareen]

It absolutely can be greater than 1. Coefficient of friction is actually tan of the angle of friction. And tan can be greater than 1.
In 2010 question it's value was 1.62. So it can be greater than 1. There is no reason why it can't be.

Yeah I was doing the same paper thanks alot

 

[Namehere]

32ln4-8ln2
8 into 4 ln4-8ln2
8ln256-8ln2
8(ln256/2)
8ln128
8ln2*7
56ln2

Or you can say 32ln4 - 8ln2 = 32ln2^2 - 8ln2 = 64ln2 -8ln2 = 56ln2. Maybe a bit shorter?

 

[sumeru]

Or you can say 32ln4 - 8ln2 = 32ln2^2 - 8ln2 = 64ln2 -8ln2 = 56ln2. Maybe a bit shorter?

haha yes, the same thing...

 

[daredevil]

Sorry for that it means sin power of 3then u write a t beside it.Dont get confused its not sin power of 3t.

umm i'm sorry wat??

well u can see it this way

(Sint)^3 + (Cost)^3

is it equal to 1??

 

[periyasamy]

umm i'm sorry wat??

well u can see it this way

(Sint)^3 + (Cost)^3

is it equal to 1??

No its not equal to 1.Here look at the pic.

 

[daredevil]

No its not equal to 1.Here look at the pic.

yea exactlyy..! that's what i was writing
seee if u can solve this equation :



and make it into

 

[Suchal Riaz]

Can anyone please give me a list of difficult questions before 2009 of M1 and P1. I will answer them and post their solutions here. i mean really difficult question. So other people can learn from my worked solutions and i learn something while doing them. anyone please. Godfather asma tareen ZaqZainab @AnyOneWhoHadDoneM1AndP1

 

[asma tareen]

I havent done all the papers but I'll look for difficult ones :/

 

[Suchal Riaz]

I havent done all the papers but I'll look for difficult ones :/

for you every question will be difficult one.

 

[asma tareen]

That's the problm Suchal Riaz

 

[Namehere]

for you every question will be difficult one.

Maybe in other subjects it will be the other way round! ^^

 

[ZaqZainab]

Can anyone please give me a list of difficult questions before 2009 of M1 and P1. I will answer them and post their solutions here. i mean really difficult question. So other people can learn from my worked solutions and i learn something while doing them. anyone please. Godfather asma tareen ZaqZainab @AnyOneWhoHadDoneM1AndP1

part iii please

 

[Namehere]

View attachment 39473
part iii please

f = hg
h = f/g = ((x-2)^2 +3)/(x-2), which simplifies to 3/(x-2) + (x-2)

Do tell me If I´m wrong.

 

[Suchal Riaz]

View attachment 39473
part iii please

lol

you are a smart girl you can figure out rest of it. it's just one mark question. it will take less than 20 sec to do but i don't have f inverse

 

[Suchal Riaz]

f = hg
h = f/g = ((x-2)^2 +3)/(x-2), which simplifies to 3/(x-2) + (x-2)

Do tell me If I´m wrong.

\
f,h,g are functions not variables

 

[Namehere]

lol
View attachment 39505
you are a smart girl you can figure out rest of it. it's just one mark question. it will take less than 20 sec to do but i don't have f inverse

I don´t get it. Can you explain please?