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Re: Algebra / Symbolic Question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg123883] Re: Algebra / Symbolic Question
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Mon, 26 Dec 2011 17:31:49 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

On 12/26/11 at 6:54 AM, lrebanks at gmail.com (Lea Rebanks) wrote:

>Given the linear function :-

>f(t):- 1/(2.75 + v1) * (t) + 1

I think you mean

f[t_]:=1/(2.75 + v1)*t + 1

for the above. Or said differently, this is how I would
translate what you posted into Mathematica syntax.

>of the form Y = M * X + B

>If v1 above equals =  0.25

>And the time is 12*t :-

>So that gives =>  1/(2.75 + 0.25) * (12 * t ) + 1

>That gives Y = 5

Only if t = 1. That is:

In[4]:= f[t_] := 1/(2.75 + v1)*t + 1

In[5]:= (f[12*t] /. v1 -> 0.25) == (1/(2.75 + 0.25))*(12*t) + 1

Out[5]= True

but

In[6]:= (1/(2.75 + 0.25))*(12*t) + 1

Out[6]= 4. t+1

>QUESTION:- Is it possible, (and I don't think it is), to re-write
>the above function f(t)

>so that the =91B=92 above is symbolically replaced with only M and
>X?

I could not decipher this last to determine what you are looking
for as a result.




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