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'耐改 = 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轴交昌镇判点的纵坐标旅搭是10

y '=2x
k=2*1=2
y-12=2(x-1)
y-12=2(0-1)
y=10