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GMAT 考满分题库

- 数学PS -
For all real numbers a, b, c, d, e,and f,the operation θ is defined by the equation (a, b, c) θ (d, e,f) = ad + be + cf. What is the value of (1,-2, 3)θ(1,-\frac{1}{2}, \frac{1}{3})?
  • A-1
  • B\frac{5}{6}
  • C1
  • D\frac{5}{2}
  • E3
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正确答案: E

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