Chapter 3 - Section 3.1 - Derivatives of Polynomials and Exponential Functions - 3.1 Exercises - Page 180: 18

$(2/3)x^{-2/3}+(4/3)x^{1/3}$

Distribute the $x^{1/3}$ $2x^{1/3}+x^{4/3}$ Differentiate using the power and constant multiple rule. Keep the constant, bring down the original power (n), and multiply by $x^{n−1}$ $2*(1/3)x^{-2/3}+(4/3)x^{1/3}$