Mathematics, 30.07.2019 18:30, marissastewart533

Prove that: \left ( a+ 2b+3c)^{2}\leq 14\left ( a^{2}+b^{2}+c^{^{2}})

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Prove that: \left ( a+ 2b+3c)^{2}\leq 14\left ( a^{2}+b^{2}+c^{^{2}})...