MATH 104 Lecture Notes - Lecture 3: Inverse Function, Logarithm
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, a function is called the inverse function of if. Always true: if exists, tyhen the graph of is the graph of. Example does not satisfy the horizontal line test is not one to one does not exist. One to one: a function is one to one when it never takes the same value more than once. Horizontal line test: a function is one to one i no horizontal line intersects the graph more than once. , the natural logarithm is the inverse of.