x^2 +y^2 +z^2 =25 a^2 +b^2 +c^2 =16 ax+by+cz=20 ((a+b+c)/(x+y+z))=? — Tinkutara Math Forum

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x^2 +y^2 +z^2 =25 a^2 +b^2 +c^2 =16 ax+by+cz=20 ((a+b+c)/(x+y+z))=?

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