Derivative of a sum.
- To: mathgroup at smc.vnet.net
- Subject: [mg101615] Derivative of a sum.
- From: "Muntoni Giampaolo" <muntoni.giampa at alice.it>
- Date: Fri, 10 Jul 2009 23:25:59 -0400 (EDT)
In order to resolve a problem I have found the question of derivating the expression e^(-x)*Sum(in i)(x^n/n!, (i,0,n));the solution is easy and is e^(-x)(x^n/n!). But using language of Mathematica I have obteined a different result with a ricorse of Gamma function...also recurring to the option of manipulate, changing the value of integer n. I would want to obtain the exact result with language of Mathematica and Manipulate respect to n and also plotting the original function and its derivative.(with manipulate) Thanks for aids Giampaolo