Re: Output display of exponential function in Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg62547] Re: Output display of exponential function in Mathematica
- From: Peter Pein <petsie at dordos.net>
- Date: Sun, 27 Nov 2005 02:41:41 -0500 (EST)
- References: <dm958i$6p8$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Bookreader schrieb: > How can I get Mathematica to display 25(5^h) when I input 5^(2+h)? This is not easy, because Mathematica simplifies the input 25*5^h automagically to 5^(2+h). In[1]:= 5^(2 + h) /. a_^(b_?NumberQ + c_) :> a^b*HoldForm[a^c] Out[1]= 25 5^h > > Also, is there a way to solve this question? I've read the help. I'm > studying for my final and am trying to find the answer to an > even-numbered question from my text. > > Factor 5^(7x/2) - 5^(x^2), with sqrt(5^x) being one of the factors. > The answer I get is sqrt(5^x) times( (5^7)-1). Who/what gave this answer? I'm sure you *don't* want Mathematica behave like this. (PowerExpand[Expand[Sqrt[5^x]^7*(1 - Sqrt[5^x]^(2*x - 7))]] yields 5^((7*x)/2) - 5^x^2 for example). > > Thanks for showing me how to do these. >