老 狗說15 years ago今天一個小朋友問我微積分, 我一看題目就說出了答案. 他就覺得很神, 露出仰慕的表情. 其實我幾乎已經忘光光了, 只是剛好那題可以用 lHôpitals rule 8 responses Show only author's response(s) Load all responses Load more older responses Load more responses New Response Register your Plurk account to respond to these plurks
