Show that the function `f(x)=3/x+7` is decreasing for `x in R-{0}` .

Explanation

To show that the function \( f(x) = \frac{3}{x} + 7 \) is decreasing for \( x \in \mathbb{R} - \{0\} \), we will follow these steps:

### Step 1: Differentiate the function
We start by finding the derivative of the function \( f(x) \).

\[ f(x) = \frac{3}{x} + 7 \]
...