Thursday, January 17, 2008
Hello all. Tian Yi suggests that we go for Tuan Yuan Fan as a group. So is 5th Feb ok with everyone? It is a tuesday, but the next day is going to be CNY celebrations, so no need to worry about going home late. Also it shouldn't clash with anyone's tuan yuan fan at home or any visiting. Therefore, if anyone has any objections with the date or cannot make it then, please inform our organising secretary (tian yi of course).
Yong Lin
SQ888
spoke at : 6:28 AM
The Virus has Bugs!!!
Hi all, remember the virus Lerong sent you all in an attempt to infect all your computers? We have found several bugs in it so maybe it will help your antivirus software remove it? Here they are, so make sure that you change your "source codes"!
P and C Q4 part ii: The answer should be 2/5, and the method is typed wrongly. Try to fix it yourself, my method is too complex to type out here. It should not be too difficult to debug this.
Differentiation Q9: The 2nd derivative is wrong! It should be -4(pi) - 6(pi)x < 0. Since it is a maximum point the 2nd derivative cannot be positive.
DE Q1: y=ux should be y=vx as given in the question. The variable u is just a typo error. A loophole for your antivirus?
DE Q4: The integration part should be integrate(1/(2400-S))dS = integrate(1/40)dt and not what is there. And when t=0, S=400 and not 2400. The rest of the code is correct though.
Happy New Year Everyone!
Yong Lin
SQ888
spoke at : 12:48 AM