题干

设曲线y=ax2在点(1,a)处的切线与直线2x﹣y﹣6=0平行,则a=(   )

A:1

B:12

C:−12

D:﹣1

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答案(点此获取答案解析)

A

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A warm thought suddenly came to her____ she might use the pocket money to buy some flowers for her mother’s birthday.