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The expression "f(x) = y" represents a mathematical function where the variable x is inputted into the function f, and the result or output of the function is represented by y.
In this context, "f" is the name or symbol of the function, "x" is the input variable, and "y" is the output or value of the function when x is used as input. The equation implies that the value of y depends on the value of x according to the rules defined by the function f.
For example, if we have a function f(x) = 2x + 3, it means that when we substitute a value for x, the function will multiply that value by 2, add 3 to it, and yield the corresponding value of y.
So, "f(x) = y" is a mathematical notation that shows the relationship between the input variable x and the corresponding output y through the function f.
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