1.

Prove that ∣∣∣∣a+b+2cabcb+c+2abcac+a+2b∣∣∣∣=2(a+b+c)3.

Answer» Prove that
∣∣
∣
∣
a+b+2cabcb+c+2abcac+a+2b∣∣
∣
∣
=2(a+b+c)3
.


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