AMC 8 1998 Problem 2

AMC8 1998 年第 2

表达式与运算☆☆☆☆
If \beginpmatrix a & b \\ c & d \endpmatrix = ad - bc, then \beginpmatrix 2 & 1 1 & 3 \endpmatrix + \beginpmatrix 3 & 2 1 & 4 \endpmatrix =
\beginpmatrix a & b \\ c & d \endpmatrix = ad - bc,则 \beginpmatrix 2 & 1 1 & 3 \endpmatrix + \beginpmatrix 3 & 2 1 & 4 \endpmatrix =
  1. A.-2
  2. B.-1
  3. C.0
  4. D.1
  5. E.2

正确答案 · Correct Answer

E

解析 · Solution

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