Answer
$ -1$
Work Step by Step
$i^26 = i^{24} \times i^2 = (i^4)^6 \times i^2 = 1^6 \times i^2 = 1 \times (-1) = -1$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.