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If a, b, c, x, y and z be real numbers a...

If a, b, c, x, y and z be real numbers and `x^(2)+y^(2)+z^(2)=16`, `a^(2)+b^(2)+c^(2)=9` and `ax+by+cz=12`; the value of `((a^(3)+b^(3)+c^(3))^((1)/(3)))/((x^(3)+y^(3)+z^(3))^((1)/(3)))` is

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