Recent content by syki

I was told to, specifically, prove the relationship: ln(η) ≈ x[SIZE="1"]1*ln(η[SIZE="1"]1) + x[SIZE="1"]2*ln(η[SIZE="1"]2) is true mathematically. I'm not really sure how to go about that.

Homework Statement Prove: ln(η) = Σ[x[SIZE="1"]i*ln(η[SIZE="1"]i)] 2. The attempt at a solution I tried using the relationship: Σ(x[SIZE="1"]i)=1 and the rules for adding logarithms, but I seem to be totally failing at this. I'm not asking to have it worked out, but any hints...