Respuesta :

we have that
∛[27*t^9/729]

we know that
27/729------> 1/27-----> 1/3³
∛[1/27]=1/3
therefore
∛[27*t^9/729]------> ∛[t^9/3³]-----> (1/3)*t^(9/3)----> (1/3)*t³----> t³/3

the answer is
t³/3