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$$x^{2}$$ ≠ 1
Quantity A
$$\frac{1}{x-1}-\frac{1}{x+1}$$
Quantity B
$$\frac{2}{x^{2}-1}$$
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A.Quantity A is greater.
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B.Quantity B is greater.
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C.The two quantities are equal.
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D.The relationship cannot be determined from the information given.
C显示答案
