Given i^(2/7), I get the following result:
Which doesn't look correct to me.
So, I entered "7th root of -1", which gave me this:
Which is what I expected.
So I thought, perhaps these aren't equivalent and I've gone wrong somewhere?
I entered "(7th root of -1) = i^(2/7)":
WolframAlpha appears to be contradicting itself!
Looking more closely, the two seem to be rotations of one another.
Is this a bug, or am I missing something here?
7th root of -1