若i为虚数单位,m,n∈R,且m+2ii=n+i,则mn=()A.-2B.1C.2D.3-高二数学

题目简介

若i为虚数单位,m,n∈R,且m+2ii=n+i,则mn=()A.-2B.1C.2D.3-高二数学

题目详情

若i为虚数单位,m,n∈R,且http://www.mofangge.com/html/qDetail/02/g2/201406/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEMAAAAkCAYAAADSO4eRAAAA1UlEQVRoge2YSQ7DIAxFOUaXwP3v1WO0q0gWMtiO2+A4/0kIMZjgH+ZSAAAAXEvv/TPLP4LF7tZwTo15KR3neIQYdJiPw50r004JqW5Yjg6PMVdHasNqFw6vGGfLQuIR4+yICYtGjJXdLG1pKwR0kaOxxgnr4vs/LwAAC1LtZF7SOGw53a7acHektfbeFbROznY36ZpgFrbW+toVtD+ME4Grs7LXfms70jTxHupuJYYExCB430vSiOFZFC+9CqRRHIDfg+s4A8QgQAwCxCBAjIJ3TfAUvjXr9Ce3goXBAAAAAElFTkSuQmCC,则mn=(  )
A.-2B.1C.2D.3
题型:单选题难度:中档来源:不详

答案

A

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