GRE MATH 官方指南 review在线阅读
?b>RuleExamples()aaaaababaabb===?()=====()pppp=======AsquarerootisarootoforderHigherorderrootsofapositivenumbernaredefinedsimilarlyForordersand,thecuberootnandfourthrootnrepresentnumberssuchthatwhentheyareraisedtothepowersand,respectively,theresultisnTheserootsobeyrulessimilartothoseabove(butwiththeexponentreplacedbyorinthefirsttworules)Therearesomenotabledifferencesbetweenoddorderrootsandevenorderroots(intherealnumbersystem):?Foroddorderroots,thereisexactlyonerootforeverynumbern,evenwhennisnegative?Forevenorderroots,thereareexactlytworootsforeverypositivenumbernandnorootsforanynegativenumbernForexample,hasexac
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