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(4pierw.2)/2do3=(2do2*2do1/2)/2do3=(2do1)/2do3=2do(2+1/2).
Korzystamy ze wzorów:4=2do2,pierw.2=2do1/2,dodajemy wykładniki:(2do5/2)/2do3=2do(-1/2)=2do(-0,5).