优优班--学霸训练营 > 知识点挑题
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            • 1.

              设\(i\)为虚数单位,则\((\dfrac{1{+}i}{i})^{2014}\)等于\(({  })\)

              A.\(2^{1007}i\)
              B.\({-}2^{1007}i\)
              C.\(2^{2014}\)
              D.\({-}2^{2014}\)
            • 2.

              \((1)\)计算\({{\log }_{2.5}}6.25+\lg \dfrac{1}{100}+\ln \sqrt{e}+{{2}^{1+{{\log }_{2}}3}} =\)______.

              \((2){{\left( \sqrt{x}-\dfrac{i}{x} \right)}^{8}}\)的二项展开式中,含\(x\)的一次项的系数为         \(.(\)用数字作答\()\)

              \((3)\)两圆\({{x}^{2}}+{{y}^{2}}+2ax+{{a}^{2}}-4=0\)和\({{x}^{2}}+{{y}^{2}}-4by-1+4{{b}^{2}}=0\)恰有三条公切线,若\(a\in R\),\(b\in R\)且\(ab\ne 0\),则\(\dfrac{1}{{{a}^{2}}}+\dfrac{1}{{{b}^{2}}}\)的最小值为_____________.

              \((4)\)对于函数\(f\left( x \right)\),如果\(f\left( x \right)\)可导,且\(f\left( x \right)={f}{{'}}\left( x \right)\)有实数根\(x\),则称\(x\)是函数\(f\left( x \right)\)的驻点\(.\)若函数\(g\left( x \right)={{x}^{2}}\left( x > 0 \right),h\left( x \right)=\ln x,\varphi \left( x \right)=\sin x\left( 0 < x < \pi \right)\)的驻点分别是\({{x}_{1}},{{x}_{2}},{{x}_{3}}\),则的大小关系是______\((\)用“\( < \)”连接\().\)   

            • 3.

              设\(i\)为虚数单位,则\((\)\(x\)\(+i)^{6}\)的展开式中含\(x\)\({\,\!}^{4}\)的项的系数为     

            • 4.

              已知\(i\)是虚数单位,复数\(z=(1+i)·i^{3}\),则 \(\dfrac{1}{z}\) 的共轭复数是(    )

              A.\(\dfrac{1-i}{2}\)
              B.\(\dfrac{1+i}{2}\)
              C.\(-1+i\)
              D.\(1+i\)
            • 5. 已知复数\(f(n)={{i}^{n}}(n\in N*)\),则集合\(\left\{ z|z=f(n) \right\}\)中元素的个数是\((\)   \()\)  

              A.\(4\)            
              B.\(3\)          
              C.\(2\)           
              D.\(1\)
            • 6.

              已知复数\(f(n)={{i}^{n}}(n\in N*)\),则集合\(\left\{ z|z=f(n) \right\}\)中元素的个数是\((\)   \()\)  

              A.\(4\)             
              B.\(3\)          
              C.\(2\)           
              D.\(1\)
            • 7.

              复数 \( \dfrac{2- \sqrt{3i}}{i} \) \((i\)为虚数单位\()\)的虚部是\((\)   \()\)

              A.\(-2\)             
              B.\(2\)          
              C.\(- \sqrt{3} \)
              D.\( \sqrt{3} \)
            • 8.

              \((1)\)计算\({{\left[ (1+2i)\cdot {{i}^{100}}+{{(\dfrac{1-i}{1+i})}^{5}} \right]}^{2}}-{{(\dfrac{1+i}{\sqrt{2}})}^{20}}\)      

              \((2)\)已知\(z\),\(ω \)为复数,\((1+3i)·z\)为纯虚数,\(ω= \dfrac{z}{2+i} \),且\(|ω|=5 \sqrt{2} \),求复数\(z\).

            • 9.

              已知\(i\)为虚数单位,复数\(z\)满足\(z(1−i)=1+i \),则\({z}^{2017}= \)(    )

              A.\(1\)
              B.\(-1\)
              C.\(i\)
              D.\(-i\)
            • 10.

              \((1)\)计算\({\log }_{2.5}6.25+\lg ⁡ \dfrac{1}{100}+\ln ⁡ \sqrt{e}+{2}^{1+{\log }_{2}3} =\)______.

              \((2){{\left( \sqrt{x}-\dfrac{i}{x} \right)}^{8}}\)的二项展开式中,含\(x\)的一次项的系数为         \(.(\)用数字作答\()\)


              \((3)\)两圆\({{x}^{2}}+{{y}^{2}}+2ax+{{a}^{2}}-4=0\)和\({{x}^{2}}+{{y}^{2}}-4by-1+4{{b}^{2}}=0\)恰有三条公切线,若\(a\in R\),\(b\in R\)且\(ab\ne 0\),则\(\dfrac{1}{{{a}^{2}}}+\dfrac{1}{{{b}^{2}}}\)的最小值为_____________.

              \((4)\)若函数\(f\left( x \right)\)满足\(f\left( x-1 \right)=\dfrac{1}{f\left( x \right)-1}\),当\(x\in \left[ -1,0 \right]\)时,\(f\left( x \right)=x\),若在区间\(\left[ -1,1 \right]\)上,\(g\left( x \right)=f\left( x \right)-mx+m\)有两个零点,则实数\(m\)的取值范围为           .

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