whats wrong with this formula?

simmo81154 

Just in case, that is interesting reading about the issue http://mathforum.org/library/drmath/view/62979.html

Hello simmo81154,

The root of a negative value is imaginary. I assume you are receiving a #NUM! error?

For example if F39=1, then your formula equates to -9879660.4144^5.2559 which is imaginary.

If you can explain your goal with this formula, I may be able to offer a valid suggestion.

P.S. Highlighting part of a formula and pressing F9 shows what that part of the formula equates to. This is perfect for trying to discover where a formula is giving an error.