math - DrBob222, Thursday, January 1, 2009 at 5:57pm
i^3 = -i
i^4 = 1
Do you notice a trend (to get to i^25)?
sqrt -900 = sqrt (-1*900) = 30i
You can check this and your work by going to google and typing in the equation; e.g., i^25 or sqrt -900 and enter.