1.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?21.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?2.已知函数f(x)=ax^2+3x-2在点(2,f(2))处的切线斜率为7,则实数a为?
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![1.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?21.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?2.已知函数f(x)=ax^2+3x-2在点(2,f(2))处的切线斜率为7,则实数a为?](/uploads/image/z/13967779-67-9.jpg?t=1.%E6%9B%B2%E7%BA%BFy%3Dx%5E3%2B11%E5%9C%A8%E7%82%B9P%281%2C12%29%E5%A4%84%E7%9A%84%E5%88%87%E7%BA%BF%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E7%82%B9%E7%9A%84%E7%BA%B5%E5%9D%90%E6%A0%87%E6%98%AF%3F21.%E6%9B%B2%E7%BA%BFy%3Dx%5E3%2B11%E5%9C%A8%E7%82%B9P%281%2C12%29%E5%A4%84%E7%9A%84%E5%88%87%E7%BA%BF%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E7%82%B9%E7%9A%84%E7%BA%B5%E5%9D%90%E6%A0%87%E6%98%AF%3F2.%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dax%5E2%2B3x-2%E5%9C%A8%E7%82%B9%282%2Cf%282%29%29%E5%A4%84%E7%9A%84%E5%88%87%E7%BA%BF%E6%96%9C%E7%8E%87%E4%B8%BA7%2C%E5%88%99%E5%AE%9E%E6%95%B0a%E4%B8%BA%3F)
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1.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?21.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?2.已知函数f(x)=ax^2+3x-2在点(2,f(2))处的切线斜率为7,则实数a为?
1.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?2
1.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?
2.已知函数f(x)=ax^2+3x-2在点(2,f(2))处的切线斜率为7,则实数a为?
1.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?21.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?2.已知函数f(x)=ax^2+3x-2在点(2,f(2))处的切线斜率为7,则实数a为?
1.对方程求导 y'=3x^2,x=1处的导数就是3*1^2=3
所以切线是y-12=3(x-1),x=0带入y=9
2.求导得f'(x)=2ax+3 x=2带入,2a*2+3=7,a=1
1. y‘=3x²
斜率=3
切线方程为
y-12=3(x-1)
令x=0
y-12=-3
y=9即为切线与y轴交点的纵坐标;
2. f’(x)=2ax+3
2a×2+3=7
4a=4
a=1
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1.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?21.曲线y=x^3+11在点P(1,12)处的切线与y轴交点的纵坐标是?2.已知函数f(x)=ax^2+3x-2在点(2,f(2))处的切线斜率为7,则实数a为?
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