已知2+3i/i=a+bi(a,b∈R,i为虚数单位),则ab=_.
问题描述:
已知
=a+bi(a,b∈R,i为虚数单位),则ab=______. 2+3i i
答
=-2i+3=3-2i=a+bi2+3i i
∴a=3,b=-2则ab=-6
故答案为:-6