Posted by Laura on Wednesday, November 14, 2012 at 10:15pm.
What is the inverse equation of f(x)=(x+2)/(x1)?

Math  Reiny, Wednesday, November 14, 2012 at 10:45pm
let y = (x+2)/(x1)
first step in finding the inverse is to interchange the x and y variables, so
inverse is
x = (y+2)/(y1)
now solve this for y
xyx = y+2
xy  y = 2+x
y(x1) = 2+x
y = (x+2)/(x1)
test with some x and y
in original , let x = 2
then y = 4/1 = 4
in new equation , let x = 4, should get y = 2
y = (4+2)/(41) = 6/3 = 2
yeah!!!!
Answer This Question
Related Questions
 Math  Determine whether each equation is true for all x for which both sides of...
 algebra  1 (a) A function passes through the points (0, 5), (1, 0), (2, 7). ...
 PreCalc  Does y=1/x have an inverse? It is a onetoone function, so it should...
 math  Determine the inverse of f(x)=(x^3)2 Is the inverse the switch of ...
 Inverse of log function  Find the inverse of f(x) = log(2+x)  4 the base is "a...
 Advanced Algebra  What is the inverse of each of the functions defined by the ...
 Math  The doubling function (y = y base0 2^(1/D)) can be used to model ...
 Algebra II (Matrices)  My book doesn't solve it like a linear equation, they ...
 inverse equation  How is any equation of the form y= x + b its own inverse?
 Algebra  Does the data in the table represent a direction variation or an ...
More Related Questions