羅亞 5 years ago 念了半天好不容易會算上下和後發現後面可以直接用定積分,幹這就跟好不容易學會因式分解後發現有公式解的存在一樣 Load all responses Load more older responses No responses - be the first :) Load more responses New Response Register your Plurk account to respond to these plurks