Răspuns:
a) 1/2+1/2=2/2=1
2/3+1/3=3/3=1
3/4+1/4=4/4=1
4/5+1/5=5/5=1
1+1+1+1=4
b) 1/11=4/44(amplificare cu 4)
1/22=2/44(amplificare cu 2)
2/11=8/44(amplificare cu 4)
3/22=6/44(amplificare cu 2)
4/44+2/44+3/44+2/44+8/44+6/44+5/44+7/44+9/44=44/44=1
Sper ca nu am gresit sa calcule.
