Question

Please help with this problem ?

Answer 1

`f(x)=3\cdot\sqrt[]{x}`
`f(x+h)=3\cdot\sqrt[]{x+h}`
`\begin{gathered} (f(x+h)-f(x))/(h)=\frac{3\cdot\sqrt[]{x+h}-3\cdot\sqrt[]{x}}{h} \\ (f(x+h)-f(x))/(h)=(3)/(h)\cdot(\sqrt[]{x+h}-\sqrt[]{x}) \end{gathered}`