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a)0,5*4*(4-1)=0,5*4*3=2*3-6
b)0,5*460*(460-1)=0,5*440*459=230*499=105570
zad7
a)5/9*(41-32)=5/9*9=45/9=5
b)5/9*(23*32)=5/9*-9=-45/9=-5
c)5/9*(97,7-32)=5/9*65,7=328,5/9=36,6