The least function value of function f(x) `=ax + b/x` (where, `a gt 0, b gt 0, x gt 0`) is ……………………

Explanation

To find the least value of the function \( f(x) = ax + \frac{b}{x} \) where \( a > 0 \), \( b > 0 \), and \( x > 0 \), we will use the method of derivatives.

### Step 1: Find the first derivative of \( f(x) \)

The function is given as:
\[ f(x) = ax + \frac{b}{x} \]
...