Question
Use the horizontal line test (Theorem 2 ) to determine which functions are one-to-one.$$f(x)=\frac{x^{2}-4}{|x-2|}$$
Step 1
A function is said to be one-to-one (or injective) if it assigns a unique output to each unique input. In other words, no two different inputs will produce the same output. Show more…
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