己知x/(a-b)=y/(b-c)=z/(c-a),求x+y+z的值.
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己知x/(a-b)=y/(b-c)=z/(c-a),求x+y+z的值.
己知x/(a-b)=y/(b-c)=z/(c-a),求x+y+z的值.
己知x/(a-b)=y/(b-c)=z/(c-a),求x+y+z的值.
设(a-b)/x=(b-c)/y=(c-a)/z=k,k不=0.x=(a-b)/k,y=(b-c)/k,z=(c-a)/k x+y+z=(a-b)/k+(b-c)/k+(c-a)/k =0/k =0