KöMaL 2020 B5097

The product of the positive numbers $x_1,x_2,\dots,x_n$ is $1$ . Prove that $x_1^4+x_2^4+\dots+x_n^4 \ge x_1^3+x_2^3+\dots+x_n^3.$

Official text KöMaL. Quoted with source.

Solutions

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