A piecewise function is a function that's simply built from pieces of different functions over several intervals.
Your information is incomplete as the function isn't given. Therefore, an overview will be given. It should be noted that a piecewise function simply means a function that's defined by multiple sub functions.
In this case, each sub-function applies to different interval in the domain as it's way of expressing the function.
Learn more about piecewise function on:
https://brainly.com/question/17966003