fx-82MS fx-82TL fx-9860GII TI-83
˟√
On a Casio calculator you can take the power root
˟√ θ SHIFT ∧
or via the CATALOG as
CATALOG P INPUT SHIFT 4 x√ F1
Example 1
To calculate 6√64 = 2
˟√ θ SHIFT ∧ ▯√▯ 6 ▷ 6 4 EXE 6√64 2
Example 2
To calculate 0,5√2 = 21/0,5 = 22 = 4
˟√ θ • 5 SHIFT ∧ 2 EXE .5√2 4
Example 3
To calculate 1√−7 = −7
˟√ θ 1 SHIFT ∧ (–) 7 EXE 1√-7 -7