What do you mean by reflection in a function?

In mathematics, people usually use the image of a function to express the nature of this function. The reflection of function refers to the image obtained after the image is symmetrical about a certain axis. For example, if the image of a function is above the X axis, then its reflection is a symmetrical image of the image below the X axis. Reflection can help us better understand the symmetry and characteristics of functions.

Reflection not only has important applications in mathematics, but also can see many examples in real life. For example, in a lake or pond, we can observe the reflection of the sky and trees. This reflection is caused by the smoothness and reflective nature of the water surface. Similarly, on a smooth glass or metal surface, we can also see the reflection of objects.

In addition to mathematics and real life, reflection often appears in literary and artistic works. In poetry and novels, reflection can symbolize inner contradiction and complexity. For example, many poets use reflections to express their self-awareness and sense of existence. In painting and photography, reflection can be used to increase the beauty and balance of works. No matter in which field, reflection is a meaningful concept.