1+1/(х+1)=(х+1)/(х+1)+1/(х+1)=(х+1+1)/(х+1)=(х+2)/(х+1)
1+2/(х+2)*(х+2)/(х+1)=1+2/(х+1)=(х+1)/(х+1)+2/(х+1)=(х+1+2)/(х+1)=(х+3)/(х+1)
1+3/(х+3)*(х+3)/(х+1)=1+ 3/(х+1)=(х+1)/(х+1)+3/(х+1)=(х+1+3)/(х+1)=(х+4)/(х+1)
и так далее
1+9/(х+9)* (х+9)/(х+1)=1+9/(х+1)=(х+1)/(х+1)+9/(х+1)=(х+1+9)/(х+1)=(х+10)/(х+1)
10/(х+10)*(х+10)/(х+1)=10/(х+1)