y-9/8 write in radical form

Question

write each expression in radical form

Answer 1

 

 

 Genarally speaking

 

                            ⁿ√(X^m) = X ^{(m/ n)}

 

 

                           X^-m  = 1/X^m   if m is rational number or integer.

Answer 2

y^-9/8=⁸√y^-9=1/(⁸√y⁹)