Exponentiation with negative base

Question

So, the R expression and its output is as follows:

> (4-7)^1.3
[1] NaN

Any ideas how to solve this in R?

Answer 1

The answer is a complex number, so you need to give it a complex argument:

> (4-7+0i)^1.3
[1] -2.451751-3.374545i

but remember this is only one root...