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Re: Simplify expressions


steger at wif.gess.ethz.ch (Thomas Steger) wrote:
> Consider the following expression:
> a+z*k^(b-1)*c^(d-1)
>
> Given that y==z*k^b*c^d I would like Mathematica to simplfy the
> preceding expression to:
> a+y/(k*c)
>
> However, the following command does not work
> Simplify[a + z*k^(b - 1)*c^(d - 1), y == z*k^b*c^d]
>
> Does anyone has a suggestion?

What version are you using?

Using version 5.0.0, what you wanted to work does work:

In[1]:= Simplify[a + z*k^(b - 1)*c^(d - 1), y == z*k^b*c^d]

Out[1]= a + y/(c*k)

David Cantrell


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