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纠错
$$x^2+x-6=0$$
Quantity A
$$\frac{1}{1+3^x}$$
Quantity B
$$\frac{1}{1+5^x}$$
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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.
D显示答案
