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Student Support Forum: 'Mathematica and cubic roots: wrong result' topicStudent Support Forum > General > "Mathematica and cubic roots: wrong result"

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Author Comment/Response
Sergio Rojas
12/15/12 10:14am


Hello all,

How can I make Mathematica provides the same answer for
(-1/2)^(2/3) = ((-1/2)^2)^(1/3) ?

What follows is a Mathematica session:

In[1]:= (-1/2)^(2/3)

1 2/3
Out[1]= (-(-))
2

In[2]:= N[%]

Out[2]= -0.31498 + 0.545562 I

In[3]:= ((-1/2)^2)^(1/3)

-(2/3)
Out[3]= 2

In[4]:= N[%]

Out[4]= 0.629961

Sergio


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