Re: Help please, Agility of Power Series
- To: mathgroup at smc.vnet.net
- Subject: [mg14653] Re: Help please, Agility of Power Series
- From: "W. K. Bertram" <wkb at ansto.gov.au>
- Date: Sat, 7 Nov 1998 02:10:02 -0500
- Organization: Australian Nuclear Science and Technology Organisation
- References: <71q8t7$j07@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Jerry Huang wrote:
> IF a f(x)= the summation of nx^n from 1 to infinity
>
> Find the closed form for f(x) by calculating the result of (1+x)*f(x)
>
>
Can't do your homework for you, but instead of (1+x)*f(x)try
(1-x)*f(x).
Cheers,
Bill