a=2/7 * (11/111)=2/7*(1/ (111/11))=2/7*(1/(10+1/11))
b=2/7 * (111/1111)=2/7*(1/(10+1/111))
c=2/7 * (1111/11111)=2/7*(1/(10+1/1111))
因为1/11>1/111>1/1111
所以a
a=2/7 * (11/111)=2/7*(1/ (111/11))=2/7*(1/(10+1/11))
b=2/7 * (111/1111)=2/7*(1/(10+1/111))
c=2/7 * (1111/11111)=2/7*(1/(10+1/1111))
因为1/11>1/111>1/1111
所以a