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If-a-b-c-gt-0-and-a-2-b-2-c-2-3-Then-prove-that-a-3-b-2-b-bc-1-




Question Number 154372 by mathdanisur last updated on 17/Sep/21
If  a;b;c>0  and  a^2 +b^2 +c^2 =3  Then prove that:  Σ (a^3 /(b^2  + b + bc)) ≥ 1
$$\mathrm{If}\:\:\mathrm{a};\mathrm{b};\mathrm{c}>\mathrm{0}\:\:\mathrm{and}\:\:\mathrm{a}^{\mathrm{2}} +\mathrm{b}^{\mathrm{2}} +\mathrm{c}^{\mathrm{2}} =\mathrm{3} \\ $$$$\mathrm{Then}\:\mathrm{prove}\:\mathrm{that}: \\ $$$$\Sigma\:\frac{\mathrm{a}^{\mathrm{3}} }{\mathrm{b}^{\mathrm{2}} \:+\:\mathrm{b}\:+\:\mathrm{bc}}\:\geqslant\:\mathrm{1} \\ $$

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