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How to find the inverse of f(x)?
f(x)=(x+3)/(x-2)
Now, I know to put y in there, like so:
x=(y+3)/(y-2)
But I just can't figure out what to do next. please help!
1 Answer
- 8 years agoFavorite Answer
hte web page (below) shows how to find the inverse of a function:
Not all functions have inverses. A function must be one to one in order to have one. A one to one function passes the horizontal line test as well as the vertical line test. In the graph of a function, no vertical line can pass through more than one point. In order to be a one to one function the same also has to be true for horizontal lines, no horizontal line can pass through more than one point of the graph. In terms of the function as an operation, this means that there can be no collapsing, two different inputs can't give you the same output, so for example f(x)=x2 isn't one to one, because when you put in negative numbers you get out the same thing as when you put in positive numbers.
more detail at web page