What are three different ways to find the inverse of a function?
I need to use 3 ways to find the inverse of
a) f(x) = x^2 2x -5
b) f(x) = log of 3 of e ^sin(x/2)
c) f(x) = 2x 1/3-x
I don't know of three ways. I only know one. maybe two. Can anyone help me, please?
I know that one. to switch the x and the y. I need to other ways though.
- 1 decade agoFavorite Answer
One way is to substitute y's for the x's and x's for the y's. Example:
x = y^2 2y - 5 and solve for y / simplify or whatever you want to do with it now
EDIT: you could also plot it on a graph and use a few points and switch the x and y values for those points. Then write an equation for a line that goes through those points. Example: points (5,3) (7,2) (random, irrelevant points). switch x and y's becomes: (3,5),(7,2)