# Problem 4

Algebra Level 5

$\frac{a+b}{a+2b+c}+\frac{4b}{a+b+2c}-\frac{8c}{a+b+3c}$

Given that $$a,b,c$$ are positive reals. Find the minimum value of the expression above.

Give your answer to three decimal places.

This problem is in this Set

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