共50条信息
\(i\)是虚数单位,若复数\((\)\(a\)\(+\)\(b\)\(i)(1+i)=7-3i\),则\(\dfrac{a}{b}\)的值为________.
设复数\(z\)\(=1-\)\(m\)\(i(i\)为虚数单位,\(m\)\(∈R)\),若\(z\)\(= -2i\),则复数\(z\)的虚部为___________.
\(i\)为虚数单位,若关于\(x\)的方程\({x}^{2}-(2+i)x+1+mi=0(m∈R) \)有一实根为\(n\),则\(m=\) ________.
若\(\left(1+ai\right)i=2-bi (a,b∈R ,i \)是虚数单位\()\),则\(\left| a+bi \right|=\) .
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