若函数在y=2xˆ2+4x处的导数是8,求x○的值.,
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若函数在y=2xˆ2+4x处的导数是8,求x○的值.,
![若函数在y=2xˆ2+4x处的导数是8,求x○的值.,](/uploads/image/z/15901432-16-2.jpg?t=%E8%8B%A5%E5%87%BD%E6%95%B0%E5%9C%A8y%3D2x%26%23710%3B2%2B4x%E5%A4%84%E7%9A%84%E5%AF%BC%E6%95%B0%E6%98%AF8%2C%E6%B1%82x%E2%97%8B%E7%9A%84%E5%80%BC.%2C)
x₀ = 1
y = 2x² + 4x
y' = 4x + 4
y'|(x₀) = 8 => 4x₀ + 4 = 8 => x₀ = 1
y = 2x² + 4x
y' = 4x + 4
y'|(x₀) = 8 => 4x₀ + 4 = 8 => x₀ = 1