[no subject]
- To: mathgroup at yoda.physics.unc.edu
- From: Cetin Cetinkaya <cetin%acm2 at yoda.physics.unc.edu>
- Date: Sun, 9 Aug 1992 16:47:27 -0500
Consider the following MMA session:
------------------------------------------------------------------------------
Mathematica 2.0 for Sun3 68881 (June 22, 1991)
Copyright 1988-91 Wolfram Research, Inc.
-- Terminal graphics initialized --
In[1]:= Expand[(x-1.)^6]
2 3 4 5 6
Out[1]= 1. - 6. x + 15. x - 20. x + 15. x - 6. x + x
In[2]:= N[%,20]
2 3 4 5 6
Out[2]= 1. - 6. x + 15. x - 20. x + 15. x - 6. x + x
In[3]:= Factor[%]
2
Out[3]= (-1. + x) (-1. + x) (-1. + x) (-1. + x) (1. - 2. x + x )
In[4]:= N[%,20]
Out[4]= (-1.000000000000198 + x) (-1.000000000000178 + x)
> (-1.000000000000001 + x) (-0.999999999999942 + x)
2
> (0.999999999999681 - 1.999999999999681 x + x )
In[5]:= Factor[%]
Out[5]= (-1. + x) (-1. + x) (-1. + x) (-1. + x) (-1. + x) (-1. + x)
In[6]:= N[%,20]
Out[6]= (-1.000000000000198 + x) (-1.000000000000178 + x)
> (-1.000000000000001 + x) (-0.999999999999942 + x)
> (-0.999999999999841 + x) (-0.99999999999984 + x)
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Logical question: How many Factor[ ] is neccesary to factorize an expression?