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這種表達方式,容易導致【歧義】,以後可以多加括號的.已知3/a=4/b=5/c =1/t則 a=3tb=4tc=5tab-bc+ac/a的平方+b的平方+c的平方的值=(ab-bc+ac)/(a^2+b^2+c^2)=(3t*4t-4t*5t+3t*5t)/(9t^2+16t^2+25t^2)=(3*4-4*5+3*5)/(...
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