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GMAT 考满分题库

- 数学PS -
For which real numbers x is the expression {1}\over{(x-2)(x+1)} not defined?
  • Ax = 0 only
  • Bx = 2 only
  • Cx = –1 only
  • Dx = –1 or 2
  • Ex = –1, 0, or 2
显示答案
正确答案: D

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