(ITA - 2007 - 1a Fase)
Assinale a opção que indica a soma dos elementos de \(A \cup B\), sendo.
\(A=\left \{ x_k=sen^2\left ( \frac{k^2\pi}{24} \right ) : k = 1,2 \right \}\) e
\(B=\left \{ y_k=sen^2\left ( \frac{(3k+5)\pi}{24} \right ) : k = 1,2 \right \}\)
0
1
2
\(\left ( 2-\sqrt{2+\sqrt{3}} \right )/3\)
\(\left ( 2+\sqrt{2-\sqrt{3}} \right )/3\)