Step-by-step explanation:
Since 74 is an even number, we can factor a 2 out of the exponent of your problem, like this:
i74=(i2)37.
But, i2=-1, so your problem becomes:
-137.
This means, multiply -1 by itself 37 times, to get -1
(Remember, -1 raised to an odd power is always -1, so -137=-1.)
The final answer is:
i74=-1
