(A) b≠0, a为任意实数 (B) a≠0, b = 0 (C) a

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问题 (A) b≠0, a为任意实数 (B) a≠0, b = 0(C) a = 1, b = 0 (D) a = 0, b = 0

选项

答案A

解析[img]/upload/tiku/190/2460371_1.jpg[/img]
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