Question

Fie raportul F(x) = $\frac{1-2 x^{2}}{ x^{2} +1}$ . Calculand F(√2) vei obtine :

Answer 1

(1-2x²)/(x²+1)
inlocuim cu x=√2
[1-2(√2)²]/[(√2)²+1]=(1-4)/(2+1)=-3/3=-1