已知2+3i/i=a+bi(a,b∈R,i为虚数单位),则ab=_.

问题描述:

已知

2+3i
i
=a+bi(a,b∈R,i为虚数单位),则ab=______.

2+3i
i
=-2i+3=3-2i=a+bi
∴a=3,b=-2则ab=-6
故答案为:-6