Biểu thức \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfKttLearuGlw5gvP1wzaeXatLxBI9gBam % XvP5wqSXMqHnxAJn0BKvguHDwzZbqegm0B1jxALjhiov2DaeHbuLwB % Lnhiov2DGi1BTfMBaebbnrfifHhDYfgasaacH8srps0lbbf9q8WrFf % euY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0RYxir-Jbba9 % q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGaaeqaba % WaaqaafaaakeaacqWGMbGzdaqadaqaaiabdIha4bGaayjkaiaawMca % aiabg2da9maabmaabaWaaSaaaeaacqaI0aancqWG4baEcqGHsislcq % aIZaWmcqWG4baEdaahaaWcbeqaaiabikdaYaaaaOqaaiabikdaYiab % dIha4naaCaaaleqabaGaeGOmaidaaOGaey4kaSIaeG4mamJaemiEaG % Naey4kaSIaeGymaedaaaGaayjkaiaawMcaamaaCaaaleqabaWaaSaa % aeaacqGHsislcqaIYaGmaeaacqaIZaWmaaaaaaaa!54A9! f\left( x \right) = {\left( {\frac{{4x - 3{x^2}}}{{2{x^2} + 3x + 1}}} \right)^{\frac{{ - 2}}{3}}}\)xác định khi:

 

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