题目内容
设m∈R,复数,z2=-2+m(m-3)i,若z1+z2是虚数,求m的取值范围.
设m∈R,复数z1=+(m-15)i,z2=-2+m(m-3)i,若z1+z2是虚数,求m的取值范围.
设m∈R,复数z1=+(m-15)i,z2=-2+m(m-3)i,若z1+z2是虚数,求m的取值范围.