【摘要】 本文应用欧氏空间Ｒｎ里的柯西不等式简化初等数学中一些与∑ｎｋ＝１ｆｋ（ｘｋ）（ｘｋ为实数）有关的不等式或最值问题的解决更多还原

【Abstract】 In this paper, we apply Cauchy inequality in Euclidean space R n to simplity solution of some of problem for inequality or extreme value about ∑nk=1 f k(x k)(x k is real number) in elementary mathematics.更多还原