劍=1,槍=1,特=1問Last edited 7 years ago[數學] 請問這一題的算式是不是:4([C2取2]x1+[C3取2]x3+[C3取2]x6+[C2取2]x9)=220啊?我確定答案是220,但就是不知道這個思路是否正確www 8 responses Show only author's response(s) 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