Question: Show that i 2 = -1, i 3 = -i, i 4 = 1, i 5 = i, and 1/i = -i,

Show that i2 = -1, i3 = -i, i4 = 1, i5 = i, · · · and 1/i = -i, 1/i2 = -1, 1/i3 = i, · · · .

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