Mathematics: Post your doubts here!

[Rutzaba]

proof (-1^3)= (-1)(-1)(-1)= (-1)(1) as minus minus is plus then we get -1 cux 3 is odd
then (-1)^2 = (-1)(-1) minus minus is plus= 1 as 2 is even

 

[Mohamed1212]

Hey can someone please help with this mechanics question?

A car with mass 1100kg drives a distance 1760 m from A to B. Find the Increase in Kinetic Energy in terms of velocity V, and find the increase in P.E at distance x where 0<=x<=1760. Then find Kwhere KV^2=x.

 

[daredevil]

can anyone plz explain the whole method step by step of how we find these points of intersection [part ii]

Suchal Riaz Rutzaba A star

 

[Rahma Abdelrahman]

Mechanics 2 -->> Nov 09 P51.
Q7 (ii) How to prove that t is between 0 and ln3??

 

[Martee100]

M/j 12 qp 33

2nd part

 

[A star]

View attachment 42440

can anyone plz explain the whole method step by step of how we find these points of intersection [part ii]

Suchal Riaz Rutzaba A star

reference

 

[daredevil]

reference

s10 qp32

 

[daredevil]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_33.pdf

Q2 .... why do we reject the negative answer?

 

[A star]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_33.pdf

Q2 .... why do we reject the negative answer?

ln of a negative no is a math error thats y

 

[daredevil]

ooohh

ln of a negative no is a math error thats y

ryt!! *facepalm*

nvm -.-

 

[daredevil]

What will be the derivative of:

(2e^2x)/(x^3) - (3e^2x)/(x^4)

??

 

[A star]

^derivate each of them seperately using quotient rule ten add a minus sign

 

[daredevil]

^derivate each of them seperately using quotient rule ten add a minus sign

derive ker liye hain but y add a minus sign??

 

[A star]

derive ker liye hain but y add a minus sign??

sawal mae minus sign hae

 

[daredevil]

sawal mae minus sign hae

u talking about the sign in between the two parts of the equation??

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_33.pdf
its actually Q4 jis ki main baat ker rahi rahi hoon....

uss ka second part.
mera answer negative aaraha hai .... and accordingly point maximum hona chahiye but the ms says that the point is minimum.
proceed!

 

[A star]

u talking about the sign in between the two parts of the equation??

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_33.pdf
its actually Q4 jis ki main baat ker rahi rahi hoon....

uss ka second part.
mera answer negative aaraha hai .... and accordingly point maximum hona chahiye but the ms says that the point is minimum.
proceed!

*gamefaceon* give me a minute

 

[Martee100]

M/J 12 Paper 33

Can some one help me with this plz :'(

 

[daredevil]

View attachment 42479

M/J 12 Paper 33

Can some one help me with this plz :'(

I got this far..... see wat i did wrong bcz I'm getting 3k+1
instead i shud be getting 3k-1... over to you ^_^

 

[daredevil]

View attachment 42479

M/J 12 Paper 33

Can some one help me with this plz :'(

I am doing the same paper

 

[A star]

I am doing the same paper

did you get it cause i cannot get whats difficult and wat you are asking my friend. u need a psychiatrist