Răspuns:
Explicație pas cu pas:
a) x = 4 / 5 si yz = 5 / 6
x × y × z = ( 4 / 5 ) × ( 5 / 6 ) = ( 5 / 5 ) × ( 4 / 6 ) = 1 × ( 2 / 3 ) = 2 / 3
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b) y = 2 / 3 si xz = 9 / 4
x × y × z = y × ( x × z ) = ( 2/3) × ( 9/4) = ( 9/3)×(2/4) = 3 × ( 1/2) = 3 / 2
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