Răspuns :
[tex]\it -0,72= -\dfrac{\ 72^{(4}}{100} = \dfrac{18}{25} \\ \\ \\ 5,36= \dfrac{\ 536^{(4}}{100} = \dfrac{134}{25}\\ \\ \\ -0,(42) =- \dfrac{\ 42^{(3}}{99}= \dfrac{14}{33}[/tex]
[tex]\it -0,72= -\dfrac{\ 72^{(4}}{100} = \dfrac{18}{25} \\ \\ \\ 5,36= \dfrac{\ 536^{(4}}{100} = \dfrac{134}{25}\\ \\ \\ -0,(42) =- \dfrac{\ 42^{(3}}{99}= \dfrac{14}{33}[/tex]