曲线y=x^2+11在点p(1,12)处的切线与y轴交点的纵坐标是?

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曲线y=x^2+11在点p(1,12)处的切线与y轴交点的纵坐标是?
曲线y=x^2+11在点p(1,12)处的切线与y轴交点的纵坐标是?

曲线y=x^2+11在点p(1,12)处的切线与y轴交点的纵坐标是?
y' = 2x
x = 1,y' = 2
切线:y - 12 = 2(x -1),y = 2x + 10
x = 0,y = 10
曲线在点p处的切线与y轴交点的纵坐标是10