## When f ‘(x) changes from negative to positive, f(x) has a

### When the derivative of a function, f'(x), changes from negative to positive at a specific point x, it indicates a change in the behavior of the function f(x) at that point

When the derivative of a function, f'(x), changes from negative to positive at a specific point x, it indicates a change in the behavior of the function f(x) at that point. Specifically, it means that the function is transitioning from decreasing to increasing at that point.

To understand this concept better, let’s break it down:

1. Derivative (f'(x)): The derivative of a function, denoted as f'(x) or dy/dx, represents the rate of change of the function at each point on its graph. It tells us how the function is changing as x varies.

2. Negative value of the derivative (f'(x) < 0): When the derivative is negative, it means that the function is decreasing at that point. In other words, as x increases, the function values are getting smaller. 3. Positive value of the derivative (f'(x) > 0): When the derivative becomes positive, it indicates that the function is now increasing at that point. So, as x continues to increase, the function values become larger.

4. Transition from negative to positive derivative: When f'(x) changes from negative to positive, it signifies a change in the trend of the function’s behavior. At the specific point where this transition occurs, the function f(x) switches from decreasing (negative derivative) to increasing (positive derivative).

In practical terms, this means that the slope of the tangent line to the graph of f(x) changes from negative to positive at that point. The function could go from decreasing to increasing, or it could also change from concave down (concave downwards) to concave up (concave upwards).

It’s important to note that this change in the sign of the derivative doesn’t necessarily indicate a strict transition from decreasing to increasing throughout the entire domain of the function. It only suggests a localized change in behavior at that specific point.

Understanding how the derivative changes helps us analyze the behavior of functions, identify critical points, extrema, and differentiable regions, among other things.

##### More Answers:

Understanding the Alternate Definition of Derivative | Exploring the Intuitive Concept of Rate of ChangeUnderstanding Increasing Behavior | The Significance of a Positive Derivative for Function f(x)

Understanding the concept of a negative derivative | Decreasing Functions and Negative Slope