Cho hai biểu thức A=-2x+1/x^2-1;B=2/x-1 + 3/x+1 - 6x+5/x^2-1 với x khác +-1
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30 Tham khảo câu trả lời từ Trợ lý ảo Lazi a) Khi x=2, ta có A=-2(2)+1/2^2-1=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/3=-4+1/
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