1. The problem asks to find the positive and negative intervals of a function, which means determining where the function's values are greater than zero (positive) and where they are less than zero (negative). 2. To find these intervals, we first need the explicit function expression, which is not provided. Generally, the steps are: 3. Find the zeros of the function by solving $f(x) = 0$. 4. Use these zeros to divide the number line into intervals. 5. Test a point from each interval in the function to determine if the function is positive or negative there. 6. Summarize the intervals where the function is positive and where it is negative. Since the function is not given, I cannot provide specific intervals. Please provide the function expression to proceed with the solution.