The conversation between human and AI assistant.
If a,b, c are the roots of x^3-x^2-1=0. Then what will be the value of Σ ((1+a) /(1-a))?
I see.
Now, let's do the same thing for 1-a. If we substitute a into 1-a, we get 1-a. Similarly, if we substitute b and c into 1-a, we get 1-b and 1-c respectively.