共50条信息
若\(z= \dfrac{1}{2}+ \dfrac{ \sqrt{3}}{2}i\),且\((x-z)^{4}=a_{0}x^{4}+a_{1}x^{3}+a_{2}x^{2}+a_{3}x+a_{4}\),则\(a_{2}=(\) \()\)
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