Cube root of -1 and 1
- To: mathgroup at smc.vnet.net
- Subject: [mg90875] Cube root of -1 and 1
- From: Bob F <deepyogurt at gmail.com>
- Date: Sun, 27 Jul 2008 02:32:16 -0400 (EDT)
Could someone explain why Mathematica evaluates these so differently? In[53]:= (Sqrt[36] - 7)^(1/3) (Sqrt[36] - 5)^(1/3) Out[53]= (-1)^(1/3) Out[54]= 1 In other words why isn't (-1)^1/3 expressed as -1 ?? Thanks... -Bob
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