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1)
Calculati media aritmetica pentru:

x= 54 17
__-__
99 61

y=166 12
__+___
99 61



Răspuns :

x=54/99-17/61
y=166/99+12/61

ma=(x+y)/2=(54/99-17/61+166/99+12/61)/2=(220/99-5/61)/2=(20/9-5/61)/2=
=(1220-45/549)/2=1175/1098