Chapter 2 - 2.2 - Functions - 2.2 Exercises - Page 186: 90

For f(x), the square root is defined for positive reals or expressions under the root, hence in this case x has to be greater than or equal to 2. This constraint doesn't apply when taking odd roots.

For f(x), the square root is defined for positive reals or expressions under the root, hence in this case x has to be greater than or equal to 2. This constraint doesn't apply when taking odd roots.