Understanding the Cube Function
The cube function, denoted as f(x) = x³, is a crucial concept in mathematics, particularly in algebra and calculus. This page introduces its definition, parity, and graphical representation.
Definition and Parity
The cube function is defined for all real numbers (R) and is expressed as f(x) = x³.
Definition: The fonction cube formule is f(x) = x³, where x is any real number.
An important property of the cube function is its parity.
Highlight: The cube function is an odd function, meaning f(-x) = -f(x) for all x.
This odd parity results in symmetry around the origin in its graph.
Graphical Representation
The graph of the cube function, known as the cube curve, has a distinctive S-shape.
Vocabulary: The graph of the fonction cube is called the courbe de la fonction cube (cube function curve).
Key points on the graph include:
- The origin (0,0) is always a point on the curve.
- The function passes through points like (1,1), (2,8), and (3,27) in the positive quadrant.
- In the negative quadrant, it passes through points like (-1,-1), (-2,-8), etc.
Example: For x = 2, f(2) = 2³ = 8, so (2,8) is a point on the curve.
The graph illustrates the rapid growth of the function in both positive and negative directions as x moves away from zero.