A function is a relation in which any value inputted in the relation yields exactly one output. x+3=y
x=1; y=4. 1 will not give any result other than 4. Graphically, a function is a graph where each x-coordinate has only one y-coordinate. So you can use the vertical line test. If you place a vertical line somewhere on the graph and it crosses the graph at more than one point, it is not a function.
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a function
what The mathematical concept of a function expresses the intuitive idea that one quantity (the argument of the function, also known as the input) completely ...
Euler introduced mathematical notation. He made contributions of complex analysis. He introduced the concept of a function, the use of exponential function, and logarithms in analytic proofs. Euler also produced the formula for the Riemann zeta function.
Increment
A function.