 
 
 
float2rational (or exact) 
takes as argument an expression.
float2rational returns a rational approximation of 
all the floating point numbers r contained in this expression, such
that |r−float2rational(r)|<є, where
є is defined by epsilon in the cas configuration 
(Cfg menu, or cas_setup command).
Input :
Output :
Input :
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Input :
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Input :
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Input :
^2)Output :
 
 
