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∵abbc+a=2000,∴a(bbc+1)=2000.∵8|2000,∴a、(bbc+1)均為偶數.又∵a、b、c是不同的質數,而2是質數中唯一的偶數,∴a=2.∴bbc+1=20002=1000,∴bbc=999.又∵999=33×37,且(3,37)=1,∴b=3,c=37,∴a+b+c= 2+3+37=42.
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