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An root function is a function expressed by x1/n for positive integer n greater than 1. The graphical representation of power functions is dependent upon whether n is even or odd.

For even values of n (i.e., n = 2, 4, 6, ...), root functions will resemble the form illustrated for square root function expressed by f (x) = x1/2

Clearly, root functions with even numbers for n, only permit values of x ≥ 0.

Similarly, for odd values of n greater than 1 (i.e., n = 3, 5, 7, ...), root functions will resemble the form illustrated for cube root function expressed by f (x) = x1/3

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