208 reputation
7
bio website derek1906.site50.net
location United States 美國, Hong Kong
age 18
visits member for 11 months
seen May 14 at 2:25
stats 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.)


May
14
awarded  Caucus
Apr
29
awarded  Informed
Feb
7
comment If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$?
This is very helpful, thanks!
Feb
7
accepted If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$?
Feb
7
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.
Feb
7
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.
Feb
7
awarded  Custodian
Feb
7
reviewed Approve suggested edit on If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$?
Feb
7
asked If $f'(x) = \sin{\frac{\pi e^x}{2}}$ and $f(0)= 1$, what is $f(2)$?
Jan
29
comment Solve without using L'Hôpital's rule?
(╯°□°)╯︵ ┻━┻ This is too complicated
Jan
29
accepted Solve without using L'Hôpital's rule?
Jan
29
awarded  Commentator
Jan
29
comment Solve without using L'Hôpital's rule?
@JonasMeyer - This is getting more complicated than I expected...
Jan
29
comment Solve without using L'Hôpital's rule?
So you can't subtract two limits that does not exist?
Jan
29
asked Solve without using L'Hôpital's rule?
Nov
25
accepted Rate vs radius?
Nov
25
comment Rate vs radius?
Thank you so much!
Nov
25
asked Rate vs radius?
Oct
14
comment What is $\cot(\pi/2)$?
Is it because of $lim_{(x\to∞)} \frac{1}{x} = 0$?
Oct
14
accepted What is $\cot(\pi/2)$?