Answer:
-i
Step-by-step explanation:
i = √-1, i² = -1, i^4 = 1
i^15 = i^4 • i^4 • i^4 • i² • i
= 1 • 1 • 1 • -1 • i
= -i
Answer:
-i
Step-by-step explanation:
i means Imaginary unit.
i to the zero power is 1
i to the first power is itself
i to the second power is -1
i to the third power is -i
Then, i to the fourth power is 1, so it all repeats again.
