若1+7i2-i=a+bi(i是虚数单位,a、b∈R),则ab为()A.-1B.1C.-2D.-3-数学

题目简介

若1+7i2-i=a+bi(i是虚数单位,a、b∈R),则ab为()A.-1B.1C.-2D.-3-数学

题目详情

http://www.mofangge.com/html/qDetail/02/g0/201401/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACcAAAAkCAYAAAAKNyObAAAAlklEQVRYhe2XTQ4AEQxGHWOW9P73mmOwshEz+qcsvpd0JepFJdqUAAA8iKhK1oiojiHJyZb6Sr6ScxX5wyK3VWx2wKxs3PJxqmGS270mAnJatIm2ynEevFTOmhMA0CmlvKdiKZdzfk5FwN0D4IflPwxt1a/6sK+WG+lyq1kivDW67s1ZDwkfEaP2ipN7tOxuaHt/zAwnacM+uDAED5IAAAAAAElFTkSuQmCC=a+bi(i是虚数单位,a、b∈R),则ab为(  )
A.-1B.1C.-2D.-3
题型:单选题难度:中档来源:不详

答案

D

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