Message-ID: <20090521105017.GB6153@anakin.ifi.uio.no>
Date: 2009-05-21T10:50:17Z
From: Zeljko Vrba
Subject: Inverse
In-Reply-To: <BLU141-W8759F1C22EB7F1384F9C4CD590@phx.gbl>
On Thu, May 21, 2009 at 08:36:27PM +1000, Kon Knafelman wrote:
>
> I have coded the following polynomial function
>
> y= function(x) x^3-2*x^2+1
>
> I need to find the inverse of this, but the code i am using now isnt returning what i want it to.
>
This function is not injective, so the inverse does not exist. For example,
y==0.5 has three solutions: -0.452, 0.597, 1.855