If x² =68, which of the following could be true?

admin2009-05-19 36

问题 If x² =68, which of the following could be true?

选项 A、-9< x <-8
B、-8< x <-7
C、-8< x<8
D、7< x <8
E、9< x <10

答案A

解析若x2=68，下列哪项可能正确?
解：本题的正确答案为(A)。考生在解答此题时，一定要注意本题只是问可能性。根据题意，8

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