Question

what is (-1)^2.5

Answer 1

i would say \(i\) as
\[(-1)^{\frac{5}{2}}=\sqrt{-1}^5=i^5=i\]

Answer 2

but i would not bet more than $7 that the answer is correct

Answer 3

Or \((-1)^{5/2} = \sqrt{(-1)^{5}} = \sqrt{-1} = i\)

Answer 4

Or, \((-1)^{2.5} = (-1)^2 * (-1)^{0.5} = 1 * \sqrt{-1} = i\)