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________.
若\((1+2\)\(a\)\(i)i=1-\)\(b\)\(i\),其中\(a\)、\(b\)\(∈\)\(R\),\(i\)是虚数单位,则\(|\)\(a\)\(+\)\(b\)\(i|=\)________.
\(z+2 \overset{¯}{z}=9+4i (i\)为虚数单位\()\),则\(\left|z\right|= \)
已知\(a,b∈R \),\(i \)是虚数单位,若\(a+i=2-bi \),则\({\left(a+bi\right)}^{2} \)
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