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Answer:
FC=1
Step-by-step explanation:
If AD:DB =8:1
SO, AE:EC is also= 8:1(by thales theorem)
Now,
since AB||EF
DB=EF
Hence,
EF=1,and CE=1
hence , BF:FC will be also in ratio of 8:1(by thales theorem)
hence, FC=1