已知(a+i)(1+bi)=2+3i,其中a、b是实数,i是虚数单位,则1a-1b=()A.1B.-1C.2D.-2-数学

题目简介

已知(a+i)(1+bi)=2+3i,其中a、b是实数,i是虚数单位,则1a-1b=()A.1B.-1C.2D.-2-数学

题目详情

已知(a+i)(1+bi)=2+3i,其中a、b是实数,i是虚数单位,则http://www.mofangge.com/html/qDetail/02/g0/201401/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACcAAAAkCAYAAAAKNyObAAAAiklEQVRYhe2XQQqAMAwE+wyPSf7/L59RTwUpKmnZaKQ7kIOgw6oE11IIIT7MrKZzmlltA8qEd6Z8cnBRhJPhPhdFOFOGO689av0jnISsiarunmnnX21fv4GjzltEZPPMyA1HOAn5Pem/peuEQ1cbWF3qL0b1OagTXTafjqdlqcKlf63ozs//hzc5ACtXiPYEIoO0AAAAAElFTkSuQmCC=(  )
A.1B.-1C.2D.-2
题型:单选题难度:中档来源:不详

答案

B

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