問題詳情
5. 由 3x2－8x＋k＝0 可推得 x－ 
＝±
，則 k＝ E 。
＝± ，則 k＝ E 。
參考答案
答案：D
難度：簡單0.713846
統計：A(4),B(38),C(17),D(232),E(0)
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