已知 为虚数单位,则复数 的虚部为:
Answer and explanation
Correct answer: C.
其他选项为什么不对: 代入检验,、、都与上面算出的 不符。
- Step 1: 展开:,因为 。
- Step 2: 实部 ,虚部 。
Answer
.
Practise more 函数与基本初等函数.
Free questions with an explanation for every one, and full timed Gaokao mock tests.
Correct answer: C.
Free questions with an explanation for every one, and full timed Gaokao mock tests.