题目
Find the roots of the equation , giving your answers in the form , where and .
题目中文翻译
求方程 的根。答案写成 的形式,其中 且 。
原卷通用作答要求
Answer all questions. You should use a calculator where appropriate.
You must show all necessary working clearly; no marks will be given for unsupported answers from a calculator.
Give non-exact numerical answers correct to 3 significant figures, or 1 decimal place for angles in degrees, unless a different level of accuracy is specified in the question.
请回答所有题目。适当时应使用计算器。必须清楚展示所有必要的计算过程;仅给出计算器答案而没有过程,不予评分。除非题目另有精度要求,非精确数值答案保留 3 位有效数字,以度为单位的角度保留 1 位小数。
解答
解法一
思路
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先把右边写成指数形式。四次根的辐角相差 ,最后把四个辐角都移到指定区间。
答题过程
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The number has modulus and argument . Its fourth roots have modulus and arguments for . Choosing four distinct arguments in gives