f(x)
notation represents a function.
Definition: In mathematics, a Function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output.
Input/Argument (x): The x
inside the parentheses is the input or argument of the function. It represents the value you're feeding into the function.
Output/Value (f(x)): f(x)
represents the output or value of the function when the input is x
. It is the result of applying the function's rule to the input x
.
Function Rule: The f
part of f(x)
represents the name of the function. The function itself has a rule or formula that tells you how to take the input x
and produce the output f(x)
. For example, if f(x) = x^2 + 3
, the function's rule is to square the input and add 3.
Domain and Range: A Function has a domain, which is the set of all possible input values (x
) for which the function is defined. It also has a range, which is the set of all possible output values (f(x)
) that the function can produce.
Graphing: Functions can be visually represented by Graph on a coordinate plane. The input x
is usually plotted on the horizontal axis (x-axis), and the output f(x)
is plotted on the vertical axis (y-axis). This creates a set of ordered pairs (x, f(x)) that form the graph of the function.
Examples:
f(x) = 2x + 1
(Linear function)g(x) = x^2
(Quadratic function)h(x) = sin(x)
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