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(-1)^(1/2.) on Mathematica!

• To: mathgroup at smc.vnet.net
• Subject: [mg107518] (-1)^(1/2.) on Mathematica!
• From: Legendre <sinankapcak at gmail.com>
• Date: Mon, 15 Feb 2010 05:48:58 -0500 (EST)

Hi,

I tried the expression (-1)^(1/2.) on Mathematica 7.0, I got 6.12323*10^(-17) + 1. i. By using //N there is no problem. But using 2. it gives a wrong answer.

Sinan

• Follow-Ups:
  • Re: (-1)^(1/2.) on Mathematica!
    • From: Murray Eisenberg <murray@math.umass.edu>