what is 7^-3/2 expressed in radical form?
\(7^{-3/2}=\frac{1}{7^{+3/2}}=\frac{1}{(7^{3})^{1/2}}=\frac{1}{\sqrt{7^{3}}}\\ or\\ =\frac{1}{\sqrt{7}^3}\\ or\\ =(\frac{1}{\sqrt{7}})^3\\\)
