Explicație pas cu pas:
[tex] \frac{1}{2} \times 2 = 1 \\ \frac{1}{2} \times 4 = 2\\ \frac{1}{2} \times 6 = 3 \\ \frac{1}{2} \times 8 = 4 \\ \frac{1}{2} \times 10 = 5 \\ \frac{1}{2} \times 12 = 6 \\ \frac{1}{2} \times 14 = 7 \\ \frac{1}{2} \times 16 = 8 \\ \frac{1}{2} \times 18 = 9[/tex]
