• 设直线过点且与圆相切,则的斜率为 :middle;" src="http://tikucommon-zs.oss-cn-beijing.aliyuncs.com/tiku/source/image/12386/swd00720214.gif"> ▲ .试题及答案-填空题-云返教育

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      设直线过点且与圆相切,则的斜率为         :middle;" src='http://tikucommon-zs.oss-cn-beijing.aliyuncs.com/tiku/source/image/12386/swd00720214.gif'>   .

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