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Jitse Niesen (talk | contribs) remove the second special case; this cannot be right for any value of n, can it? x_{n+1} must be linear in A whatever n is |
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The principal [[nth root|''n''th root]] <math>\sqrt[n]{A}</math> of a [[negative and positive numbers|positive]] [[real number]] ''A'', is the positive real solution of the equation
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