2. 外语
  3. If , where a, b, and c are each equal to 0 or 1, then x could be each of the following EXCEPT:

If , where a, b, and c are each equal to 0 or 1, then x could be each of the following EXCEPT:

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问题 If , where a, b, and c are each equal to 0 or 1, then x could be each of the following EXCEPT:
选项 A、 
B、 
C、 
D、 
E、 
答案D
解析 The most direct way to address this problem, since there are only eight possible values for x, is to determine all the possible values and then check them against the possible answers, x could equal 0, 1/27, 3/27(=1/9), 4/27, 9/27(=1/3), 10/27, 12/27(=4/9), or 13/27. The only answer not among these choices is D, 2/9.
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