Question

(2007山東威海)如下圖，數(shù)軸上表示1，的對(duì)應(yīng)點(diǎn)分別為點(diǎn)A，點(diǎn)B．若點(diǎn)B關(guān)于點(diǎn)A的對(duì)稱點(diǎn)為點(diǎn)C，則點(diǎn)C所表示的數(shù)是

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A．

B．

C．

D．

Answer 1

答案：C
解析：

由于點(diǎn)B關(guān)于點(diǎn)A的對(duì)稱點(diǎn)C，則AB=AC，設(shè)C點(diǎn)表示的數(shù)為x，則有，則．