Texas Instruments TI-89 and TI-92 Plus Computer 

Last page update: Sunday, November 21, 1999 
Inverse Function - for the TI-89 and TI-92 Plus
Version 1.0   (Monday, September 07, 1999)
Download [ inv.89f  | inv.9xf ] (823 bytes)
Description Inverts a function and swaps the variables.  
Screen shots
Screen image 
Documentation Usage: 

Expr can be a function, expression, equation, or inequality. If Expr is not an equation, it will be assumed to be equal to DependantVar

DependantVar will become the independant variable in the returned expression. 

IndependantVar will become the dependant variable in the returned expression. 

Return value: 
The inverted expression with dependant and independant variables swapped. 

1. inv(y=2x+4,y,x) 
2. y=x2+2x-4,y,x)