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Calculati : a) (-2/5):(2013/2008-2/3:2013/5)
b) (-2/5):17/7-2/5×17/77-2/5×17


Răspuns :

eu iti scriu direct rezolvarea.
[tex] \frac{-2}{5} * \frac{7}{17} - \frac{34}{385} - \frac{34}{5} = \frac{14}{85} ^{77} - \frac{34}{85} ^{17} - \frac{34}{5} ^{1309}= \frac{1078}{6545} - \frac{578}{6545} - \frac{44506}{6545}= [tex] \frac{-44006}{6545} [/tex]