Réponse:
[tex] {2}^{7} = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \\ {2}^{7} \times 2 = {2}^{8} [/tex]
[tex] {2}^{4} \div 2 = 2 \times 2 \times 2 \times 2 \div 2 \\ = 2 \times 2 \times 2 \\ = {2}^{3} [/tex]
[tex] {3}^{8} = 3 \times 3 \times 3 \times 3 \times 3 \times 3 \times 3 \times 3 \\ {3}^{8} \times 3 = {3}^{9} [/tex]
[tex] \div 4 = \div 2 \div 2 \\ {2}^{10} \div 4 = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \div 2 \div 2 \\ 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 = {2}^{8} [/tex]
