Solution 40237: TI-30XII Solar and TI-30XII Battery displays Domain Error when Entering Certain Fractional Exponents.
Why does the TI-30XII Solar and TI-30XII Battery displays Domain Error when Entering Certain Fractional Exponents?
The caret key has limitations for the functions it will accept for Y^X. If the below condition is met it will give a domain error:
Y<0, X<1, and 1/X is not an integer
For example the problems below will return a domain error since they meet the restriction above:
To workaround this limitation you can rewrite these functions using an identity x^(y/z) = z xRoot x^y:
3 xRoot (-25)^2
7 xRoot (-280)^3
5 xRoot (-2)^3
Please see the TI-30XIIS/B and TI-30XS MultiView guidebooks for additional information.