Mathematics, 22.04.2020 21:21 klawess4

Let x+y+z=5 where x, y,z∈R. Prove that x^2+y^2+z^2 ≥5/3

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Let x+y+z=5 where x, y,z∈R. Prove that x^2+y^2+z^2 ≥5/3...