Explicație pas cu pas:
[tex]5 \times {2}^{n + 1} + 3 \times {2}^{n + 1} = 5 \times {2}^{n} \times 2 + 3 \times {2}^{n} \times 2 \\ = 10 \times {2}^{n} + 6 \times {2}^{n} = {2}^{n} \times (10 + 6) = {2}^{n} \times 16[/tex]
[tex]9 \times {2}^{n} + {2}^{n} \times 7 = {2}^{n} \times (9 + 7) = {2}^{n} \times 16[/tex]
