1-1 inverse functions

  • #1
steve snash
50
0

Homework Statement


f(22)=9 and f^-1(13)=7

find f^-1(9) and f(7)

(given that these are 1-1 functions)

Homework Equations


What does this mean as the have not given the equations they used to find the values, i know inverse function is the function that can find the opposite of the original function.


The Attempt at a Solution


Can someone help me see how to start to work out this problem??
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,223
31
If a function f maps x onto y, then what should the inverse function do?
 
  • #3
steve snash
50
0
map y onto x, but what does that mean
 
  • #4
rock.freak667
Homework Helper
6,223
31
map y onto x, but what does that mean

In the first case f(22)=9, this means that the function f, maps 22 to 9.

then f-1(9), means the function f-1 maps 9 onto ?
 
  • #5
icystrike
446
1

Homework Statement


f(22)=9 and f^-1(13)=7

find f^-1(9) and f(7)

(given that these are 1-1 functions)

Homework Equations


What does this mean as the have not given the equations they used to find the values, i know inverse function is the function that can find the opposite of the original function.


The Attempt at a Solution


Can someone help me see how to start to work out this problem??

What does it mean by [tex]f^{-1}[f(x)][/tex] or [tex]f[f^{-1}(x)][/tex] it simply means to tie your shoelace and undo it .. or vice versa.
 

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