## What is the first derivative test for relative extrema?

If the derivative of a function changes sign around a critical point, the function is said to have a local (relative) extremum at that point.

**What is the second derivative test for relative extrema?**

The second derivative may be used to determine local extrema of a function under certain conditions. If a function has a critical point for which f′(x) = 0 and the second derivative is positive at this point, then f has a local minimum here.

**What is the difference between first derivative test and second derivative test?**

The biggest difference is that the first derivative test always determines whether a function has a local maximum, a local minimum, or neither; however, the second derivative test fails to yield a conclusion when y” is zero at a critical value.

### How do you test relative extrema?

Relative Extremum : Example Question #1 To find relative maximums, we need to find where our first derivative changes sign. To do this, find your first derivative and then find where it is equal to zero. Because we are only concerned about the interval from -5 to 0, we only need to test points on that interval.

**What is 1st derivative test?**

First-derivative test. The first-derivative test examines a function’s monotonic properties (where the function is increasing or decreasing), focusing on a particular point in its domain. If the function “switches” from increasing to decreasing at the point, then the function will achieve a highest value at that point.

**What is the second derivative test used for?**

The second derivative test uses the first and second derivative of a function to determine relative maximums and relative minimums of a function.

## How do you find relative extrema?

**What does the first derivative test tell you?**

**How do you know when to use first derivative test?**

The first derivative test is used to examine where a function is increasing or decreasing on its domain and to identify its local maxima and minima. The first derivative is the slope of the line tangent to the graph of a function at a given point.

### What is second derivative test used for?

**Why do we use first derivative test?**