Square root is the invert function of power. Example: ${\displaystyle {\sqrt {16}}\ =4,4^{2}=16,{\sqrt {16}}\ =16^{1/2}}$ , where ${\displaystyle {\sqrt {4^{2}}}\ =4}$ So in general: ${\displaystyle {\sqrt {x}}\ =x^{1/2},{\sqrt[{n}]{x^{n}}}=x}$