In article <scadnQfj0LimP9XPnZ2dnUVZ_t2dnZ2d@megapath.net>, Hetware <firstname.lastname@example.org> wrote:
> On 9/29/2013 3:14 PM, quasi wrote: > > > Bottom line: > > > > The concept of function evaluation is _direct_ _substitution_. > > That is certainly not contained in any definition of /function/ I'm > familiar with. A real valued function of real numbers is a set of > ordered pairs of real numbers. The first number is often referred to as > a member of the domain, whereas the second as a member of the range. > > Can this equation be solved for t? > > (t^2-9)/(t-3) = 6
Note that the equation (t^2-9)/(t-3) = 6 and the equation (t^2-9) = 6*(x-3) are NOT equivalent unless one requires that x =/= 3.
Standard algebraic notation requires that the in evaluation of '(t^2-9)/(t-3)', the numerator and denominator both be evaluated separately before the division can be performed. --