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There is a mistake in picture; I mean y'=0 not y=0 I used the graph 1 - ln x to find the sign of the main graph (when it goes up and down and to find critical point).

Vertical asymptote - when there is a border (check for domain) - Let x goes to - infinity and + infinity if both results are equal to - infinity or -infinity so there is vertical asymptote. * Only one type occurs if there is a border don't need to find lim Horizontal asymptote: - Let x goes -...

Sketch y = lnx/x I found the first derivative = (1 - lnx)/x^2 Domain x>0 which is x= 0 is vertical tangent. y' = 0 result x = e. lim (x - to - infinity and + infinity) = 0 horizontal tangent. Check the sign y'= 1 - lnx It made me confused should x is positive or negative???

I think you are right. Force is determined by the charged and the velocity of the particle and magnitude of external magnetic field. It only changes the direction of the particle.

But according to text book, when a charged particle moves into an external magnetic field will experience a force which causes it to change the direction F=qvBsin theta. So you said that there are no change except for the direction. Which one is correct (only change in direction or both...

My question is just simple: When an electron moves with particular speed into an external magnetic field. Is there a change in speed of an electron (before entering and after)?

You wrote that flux=BAcostheta But according to definition, magnetic flux shows number of magnetic field lines passing through surface area (of course we know at 90 degree). All right flux=BA cos 90 flux = 0 But maxium flux when at 90 therefore, I think something wrong with the formula!!!

The velocity of a body P is given by Find the value of t when x=pi/4 if P starts from the origin.

Wow just got exam today (interview). freaky teacher continuously asking questions, and i dont know what to reply back. I made up as I went through!!! (The best thing about learning Vietnamese is that u can make up things (ahahha)). I am still thinking drop Viet for year 12 (do 4 unit maths and...

Age group: Gender: Name (optional): Please complete the following table by placing a tick in the relevant box ( 1 being very important and 5 being not important). 1. How important is exercise and fitness to you? ( ) 1 ( ) 2 ( ) 3 ( )...

Any one know what should I do now to prepare for Physical Journey next year? (Books or notes about Physical Journey) What do I expect to know before the exam???:worried:

Yeah I agree with u. That's why I post it here for help!!!

I have seen this link before somewhere in this forum. Any way, thanks for the link!!!

Let Rewrite the formulae for S as quadratic equation in 2^x.

Yes I did try but still....

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I just finished this note today. Hope it will help you!!! http://www.yousendit.com/transfer.php?action=download&ufid=1333CD9D1921B475

I'm thinking of changing to new school. I dont know it is late to take exam for selective high school at this stage (year 11 now). I think there are school still has vacancy left. WHat should I do now ? (If not make it, what u suggest for public school, I currently live in South Western NSW near...

As ragerunner has said; if your teachers are strict in marking and you got well marks. I think you will done well in HSC:)

thank you. I heard from my teacher that all questions about 3-D trig in exam papers they will include the picture for us.:)