∵ 1/A +1/B +1/C = 1/1993
1993×6=11958>9999(四位数)
1/1993=6/11958=(2+3+1)/11958
= 2/11958 +3/11958+1/11958
=1/5979 + 1/3986 + 1/11958
∴ A=5979 B= 3986 C=11958
∵ 1/A +1/B +1/C = 1/1993
1993×6=11958>9999(四位数)
1/1993=6/11958=(2+3+1)/11958
= 2/11958 +3/11958+1/11958
=1/5979 + 1/3986 + 1/11958
∴ A=5979 B= 3986 C=11958