Respuesta :

[tex]i = \sqrt{ - 1}[/tex]

[tex]i {}^{2} = - 1[/tex]

[tex]i {}^{ 3} = - 1 \sqrt{ - 1} [/tex]

[tex]i {}^{4} = 1[/tex]

[tex]i {}^{8} = i {}^{4} \times i {}^{4} = 1 \times 1 = 1[/tex]