一个重要不等式的推广

The extend of a important inequality

对〔1〕中的结论 :若a ,b ,c∈R+,n∈N ,且有n≥ 2 ,则 (an+bn +cn) /3 ≥ [(a +b +c) /3] n。

For the result in document [1],if a,b,c ∈ R +,n ∈ N, further more n≥2,then (a n+b n+c n)/3>[(a+b+c)/3] n. This diction is extended positive number n. 