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            • 1.

              若复数\(z\)满足\(|z|=1(i\)为虚数单位\()\),则\(|z-2i|\)的最小值是_____.

            • 2. 已知复数\(z\)满足\(z= \dfrac {5}{1-2i}(i\)是虚数单位\()\),则\(|z|=\) ______ .
            • 3.

              设复数\(z\)满足\(\left( 1+i \right)z=\left| 1-i \right|(i\)为虚数单位\()\),则复数\(z\)的共轭复数\(\overline{z}=\)(    )

              A.\(1+i\)
              B.\(1-i\)
              C.\(\dfrac{\sqrt{2}}{2}-\dfrac{\sqrt{2}}{2}i\)      
              D.\(\dfrac{\sqrt{2}}{2}+\dfrac{\sqrt{2}}{2}i\)
            • 4.

              设复数\(z=a+b{i}\) \(\left(a,b∈R,a > 0\right) \),满足\(|z|=\sqrt{10}\),且复数\((1-2i)z\)在复平面上对应的点在第二、四象限的角平分线上.

              \((1)\)求复数\(z\);

              \((2)\)若\(\overset{¯}{z}+ \dfrac{m+i}{1-i}\left(m∈R\right) \)为纯虚数,求实数\(m\)的值.

            • 5.

              设复数\(z\)满足\((1{+}i)z{=}2i\),则\({|}z{|} = ({  })\)

              A.\(\dfrac{1}{2}\)
              B.\(\dfrac{\sqrt{2}}{2}\)
              C.\(\sqrt{2}\)
              D.\(2\)
            • 6.

              若\(z= \dfrac{2-i}{2+i} \),则\(|z|=(\)  \()\)

              A.\(\dfrac{1}{5} \)
              B.\(1\)
              C.\(5\)
              D.\(25\)
            • 7.
              已知\(z=4-3i\),则\(|z|=\) ______ .
            • 8.

              已知复数\(z\)满足\(z\)\(+|\)\(z\)\(|=2+8i\),则复数\(z\)\(=\)______.

            • 9.

              若\( \dfrac {a}{1-i}=1-bi\),其中\(a\),\(b\)都是实数,\(i\)是虚数单位,则\(|a+bi|=\) ______ 

            • 10.

              对任意复数\(z\)\(=\)\(x\)\(+\)\(yi\)\((\)\(x\)\(y\)\(∈\)\(R\) ,\(i\)为虚数单位\()\),则下列结论正确的是\((\)   \()\)

              A.\(\left| z{-}\overline{{z}} \right|=2y\)
              B.\({{z}^{2}}={{x}^{2}}+{{y}^{2}}\)
              C.\(|z· \bar{z}|\geqslant 2x \)
              D.\(\left| z \right|\leqslant \left| x \right|+\left| y \right|\)
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