dau ciroana va rog rezolvati urgent

Răspuns:
1/3 -> 1/4 -> 1/5 -> 1/6 -> 1/7
Explicație pas cu pas:
1/3*3/4= 3/12=1/4
1/4*4/5= 4/20= 1/5
1/5*5/6= 5/30=1/6
1/6*6/7= 6/42=1/7