# Derek 朕會功夫

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bio website derek1906.site50.net location United States 美國, Hong Kong age 18 member for 11 months seen May 14 at 2:25 profile views 31

QWERTYUIOP

ASDFGHJKL

ZXCVBNM

jQuery is taking over the world! http://i.stack.imgur.com/sGhaO.gif

function aboutMe(){
var person = {
name : "Derek",
language : ["JavaScript", "PHP-some"],
website : "http://derek1906.site50.net",
use : function(){
stayInStackOverflow(today);
}
}
return person;
};


Hi there! I am the 283863 th user in stackoverflow.

Visit my website at:

(Actually both of them are the same.)

# 35 Actions

 May14 awarded Caucus Apr29 awarded Informed Feb7 comment If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$?This is very helpful, thanks! Feb7 accepted If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$? Feb7 comment If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$?@mrf - Yes I am pretty sure I copied it correctly. Feb7 comment If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$?So what do I do with the $c$? And when I plug in $2$ or $0$ into $c$, both does not seem to give me a correct answer. Feb7 awarded Custodian Feb7 reviewed Approve suggested edit on If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$? Feb7 asked If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$? Jan29 comment Solve without using L'Hôpital's rule?(╯°□°）╯︵ ┻━┻ This is too complicated Jan29 accepted Solve without using L'Hôpital's rule? Jan29 awarded Commentator Jan29 comment Solve without using L'Hôpital's rule?@JonasMeyer - This is getting more complicated than I expected... Jan29 comment Solve without using L'Hôpital's rule?So you can't subtract two limits that does not exist? Jan29 asked Solve without using L'Hôpital's rule? Nov25 accepted Rate vs radius? Nov25 comment Rate vs radius?Thank you so much! Nov25 asked Rate vs radius? Oct14 comment What is $\cot(\pi/2)$?Is it because of $lim_{(x\to∞)} \frac{1}{x} = 0$? Oct14 accepted What is $\cot(\pi/2)$?