题目内容
设a,b,c∈R+,求证:a5+b5+c5≥a3bc+b3ac+c3ab.
证明:∵a5+a5+a5+b5+c5≥5a3bc,?
b5+b5+b5+a5+c5≥5b3ac,?
c5+c5+c5+a5+b5≥5c3ab,?
∴a5+b5+c5≥a3bc+b3ac+c3ab.
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题目内容
设a,b,c∈R+,求证:a5+b5+c5≥a3bc+b3ac+c3ab.
证明:∵a5+a5+a5+b5+c5≥5a3bc,?
b5+b5+b5+a5+c5≥5b3ac,?
c5+c5+c5+a5+b5≥5c3ab,?
∴a5+b5+c5≥a3bc+b3ac+c3ab.