Re: Problem with Limits; basic calculus
- To: mathgroup at smc.vnet.net
- Subject: [mg38957] Re: Problem with Limits; basic calculus
- From: Bill Rowe <listuser at earthlink.net>
- Date: Wed, 22 Jan 2003 06:13:43 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
On 1/21/03 at 7:39 AM, sophtwarez at hotmail.com (David Seruyange) wrote: >We were given the following function and asked to determine a limit: >(3E^(-x) - E^(-3x)) / (E^(-3x) + E^(-x)) >Usually the approach is to select the dominant terms, factor and then >determine the limit. My initial reason had me select -E^(-3x) in the >numerator and E^(-3x) in the denominator. E^(-x) > E^(-3x) for x > 0. So, try multiplying the numerator and denominator by E^x