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Cum rezolv acest exercitiu ( imi explicati va rog)
a) Stiind ca a x b = 3/7 si c = 14/15, calculati a x (b x c )
b) Stiind ca a x b = 21/17 si c = 51/14, calculati (a x b) x c
c) Stiind ca a x b = 42/5 si c x d = 35/77