GMAT 考满分题库

- 数学PS -
The operation □ is defined for all a and b by a □ b = a + b+ ab, If a□b = 0 and b≠-1, what is a in terms of b?
  • A(b+1)/b
  • B(b-1)/(b+1)
  • C1/(b+1)
  • Db/(b+1)
  • E-b/(b+1)
显示答案
正确答案: E

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