In general,
[tex]\sqrt[]{x}=x^{\frac{1}{2}}[/tex]
Therefore, in our case,
[tex]\sqrt[]{y^{14}}=(y^{14})^{\frac{1}{2}}=y^{\frac{14}{2}}=|y|^7[/tex]
Then, in fractional form the answer is y^(14/2); if we simplify it, we need to take the absolute value obtaining |y|^7
