设 $n\in N,n\ge2,a>0$ 证明 :$(a-1)((n+1)a^n+(n-1)-(n+1)a-(n-1)a^{n+1})\le0$
转载于:https://www.cnblogs.com/zjyyhs/archive/2013/04/17/3025649.html
设 $n\in N,n\ge2,a>0$ 证明 :$(a-1)((n+1)a^n+(n-1)-(n+1)a-(n-1)a^{n+1})\le0$
转载于:https://www.cnblogs.com/zjyyhs/archive/2013/04/17/3025649.html