inv
Syntax
inv(function, point)
Description
Finds the inverse function of function. If the supplied function is not one-to-one
its domain will be restricted to make it one-to-one. The domain chosen will be the one that contains
the point where x = point. If the supplied function is one-to-one point
can be any real number.
Note that this function is equivalent to
and internally this is all inv does.
Note that this function is equivalent to
and internally this is all inv does.
Parameters
function
The function whose inverse is to be found. The variable is assumed to be x as there is
no parameter to specify it.
point
An x value of the function that is not to be excluded from the domain of function
(not its inverse). This means that
where f-1 is the inverse of function.
If point corresponds to a turning point this won't be enough to determine how the domain should be restricted to make function one-to-one. Generally when this happens two solutions get returned in a list.
where f-1 is the inverse of function.
If point corresponds to a turning point this won't be enough to determine how the domain should be restricted to make function one-to-one. Generally when this happens two solutions get returned in a list.
Return Value
The inverse of function.
Examples
