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Help w/ Mathematica: simple stuff

  • To: mathgroup at smc.vnet.net
  • Subject: [mg30764] Help w/ Mathematica: simple stuff
  • From: sophtwarez at yahoo.com (Daita Mizohu)
  • Date: Sun, 9 Sep 2001 20:42:58 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello all, 

I'm a mathematica novice and only doing basic calculus.  We have a
question that is as follows:

y[1]=a
y'[x]=(r*y[x])/x

Explain Mathematica output of...
y[x]=ax^r

I guess I don't understand what x is doing in the denominator.  The
y[1]=a part is straight forward; when x is 1 then no matter what
constant r is it will be 1.  I also know from my material that when
y[x]=kE^rx then y'[x]=r*y[x].

Thanks much, 

Daita, M.


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