题干
--- How do you deal with the disagreement between the company and the customers?
--- The key __ the problem is to meet the demand__ by the customers．
--- The key __ the problem is to meet the demand__ by the customers．
A：to solving; making
B：to solve; making
C：to solving; made
D：to solve; made
答案(点此获取答案解析）
C
的通项公式
，若使得
取得最小值，n=" " （ ）