曲线C:y=ax2在点P(1,a)处的切线的斜率为3,则 a=
问题描述:
曲线C:y=ax2在点P(1,a)处的切线的斜率为3,则 a=
答
∵y=ax2的导数y ' =2ax
∴y=ax2在点P(1,a)处的切线的斜率为 2a =3
∴ a =3/2