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2. （5 分）设复数 $z$ 满足 $z+i=3-i$, 则 $\bar{z}=(\quad)$

Gaokao · Math · previous-year question

  1. A.$-1+2 i$
  2. B.$1-2 i$
  3. C.$3+2 i$correct
  4. D.$3-2 i$

Answer

C. $3+2 i$

Explanation

解: $\because$ 复数 $z$ 满足 $z+i=3-\mathrm{i}$, $\therefore z=3-2 i$, $\therefore \bar{z}=3+2 i$ 故选: C.

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