4. to check that the function f is 1-1? l_flag_hongkong.gif. In this case, monitoring will need to know before then whether f is a function, and are suspected of each Member on each Rf matching only once? How to check if a function f is 1-1. There are several ways to raise, for example, only two ways: 1. how to determine the equation of the function. If you consider that every time instead of the y-values into the equation one has only one x value, the function is always 1-1 like. f = {( x , y ) R R | y = 2x} Consider the equation y = 2x When the substitution y = 2, x = 1, only a single value. When the substitution y = 3, x = one value. Therefore, f is 1-1. G = {(x, y) R R |} is a function. Consider the equation When the substitution y = 1, x = ± 1, 2 up. Therefore, it is no function 1-1 g. 2. how the graph of the function f if the function's graph see see a straight line that is parallel to the x axis of the graph of f over some line wrapping for 1 point and f is not a function 1-1 (if the straight line parallel to the x axis of the graph of f cutting line no more than 1 point and f is a function, 1-1).
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