【若i是虚数单位,则复数2i+1+i/i=A.1-iB.1+iC-1+3i.D.1+3i若i是虚数单位,则复数2i+1+i/i=A.1-iB.1+iC-1+3i.D.1+3i】
<p>问题：【若i是虚数单位,则复数2i+1+i/i=A.1-iB.1+iC-1+3i.D.1+3i若i是虚数单位,则复数2i+1+i/i=A.1-iB.1+iC-1+3i.D.1+3i】<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">暴建民的回答：<div class="content-b">网友采纳 C上下式同乘i,再化简
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