若a=2000x+2001,b=2000x+2002,c=2000x+2003.求a^2+b^2+c^-ab-ac-bc.
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![若a=2000x+2001,b=2000x+2002,c=2000x+2003.求a^2+b^2+c^-ab-ac-bc.](/uploads/image/z/4097787-51-7.jpg?t=%E8%8B%A5a%3D2000x%2B2001%2Cb%3D2000x%2B2002%2Cc%3D2000x%2B2003.%E6%B1%82a%5E2%2Bb%5E2%2Bc%5E-ab-ac-bc.)
若a=2000x+2001,b=2000x+2002,c=2000x+2003.求a^2+b^2+c^-ab-ac-bc.
若a=2000x+2001,b=2000x+2002,c=2000x+2003.求a^2+b^2+c^-ab-ac-bc.
若a=2000x+2001,b=2000x+2002,c=2000x+2003.求a^2+b^2+c^-ab-ac-bc.
a^2+b^2+c^-ab-ac-bc.
=1/2[(a-b)^2+(b-c)^2+(a-c)^2]
=1/2[1+1+4]
=3