Răspuns :
[tex] {4}^{27} \times 4 \div {4}^{28} [/tex]
[tex] {4}^{27} \times {4}^{1} \times {4}^{ - 28} [/tex]
[tex] {4}^{27 + 1 - 28} [/tex]
[tex] {4}^{0} [/tex]
[tex]1[/tex]
[tex] {4}^{27} \times 4 \div {4}^{28} [/tex]
[tex] {4}^{27} \times {4}^{1} \times {4}^{ - 28} [/tex]
[tex] {4}^{27 + 1 - 28} [/tex]
[tex] {4}^{0} [/tex]
[tex]1[/tex]