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The nth-root function is the right-shifted function of the square-root key, second column from the left, fifth row from the top.
In RPL mode, to calculate the third root of eight, press 8 ENTER 3 right-shift [nth-root] and get 2.
In algebraic mode, press right-shift [nth-root] 3 right-shift [,] 8 ENTER and get 2. (The comma is the right-shifted function of the SPC key on the bottom row.)
Use the nth-root function, which is the shifted function of the y^x key just above the divide key. For example, to calculate the 5th root of 32, press 32 2nd [xth-root] 5 =
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