Try to plot x^(2/3).. what happen for x<0 ?

08222019, 08:08 AM
(This post was last modified: 08222019 08:10 AM by ijabbott.)
Post: #3




RE: Try to plot x^(2/3).. what happen for x<0 ?
You can redefine the second one as \( \big( \sqrt[3]{x}\big)^2 \) to square the real cube root of \( x\).
Note that \(x^\frac{1}{3}\) and \(\sqrt[3]{x}\) are treated differently, and that \(x^\frac{1}{3}\) usually produces a complex number when \( x < 0 \), and its square is also complex, so it cannot be plotted by the Function app. — Ian Abbott 

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Messages In This Thread 
Try to plot x^(2/3).. what happen for x<0 ?  josephec  08222019, 03:45 AM
RE: Try to plot x^(2/3).. what happen for x<0 ?  rkf  08222019, 06:45 AM
RE: Try to plot x^(2/3).. what happen for x<0 ?  ijabbott  08222019 08:08 AM

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