2/3+2/9+2/27+... b1=2/3 q=1/3<1 S=b1/1-q=1/3:(1-1/3)=1/3:2/3=1/2
3/2+3/4+3/8+... b1=3/2 q=1/2<1 S=3/2:(1/1/2)=3/2:1/2=3
2+3+2/3+3/2+2/9+3/4+ ...=5+1/2+3=8 1/
2/3+2/9+2/27+... b1=2/3 q=1/3<1 S=b1/1-q=1/3:(1-1/3)=1/3:2/3=1/2
3/2+3/4+3/8+... b1=3/2 q=1/2<1 S=3/2:(1/1/2)=3/2:1/2=3
2+3+2/3+3/2+2/9+3/4+ ...=5+1/2+3=8 1/