已知函数f(x)为偶函数,x>=0时,f(x)=x^2-ax(a属于R)问(1)a=2时,方程f(x)=kx+2k有4个零点,求k的取值范围(2)若函数G(x)=|f(x)|在已知区间[-m,m](m>0)上的最大值为G(m),求a满足的条件
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![已知函数f(x)为偶函数,x>=0时,f(x)=x^2-ax(a属于R)问(1)a=2时,方程f(x)=kx+2k有4个零点,求k的取值范围(2)若函数G(x)=|f(x)|在已知区间[-m,m](m>0)上的最大值为G(m),求a满足的条件](/uploads/image/z/11526230-38-0.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%E4%B8%BA%E5%81%B6%E5%87%BD%E6%95%B0%2Cx%3E%3D0%E6%97%B6%2Cf%28x%29%3Dx%5E2-ax%28a%E5%B1%9E%E4%BA%8ER%29%E9%97%AE%281%29a%3D2%E6%97%B6%2C%E6%96%B9%E7%A8%8Bf%28x%29%3Dkx%2B2k%E6%9C%894%E4%B8%AA%E9%9B%B6%E7%82%B9%2C%E6%B1%82k%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%282%29%E8%8B%A5%E5%87%BD%E6%95%B0G%28x%29%3D%7Cf%28x%29%7C%E5%9C%A8%E5%B7%B2%E7%9F%A5%E5%8C%BA%E9%97%B4%5B-m%2Cm%5D%28m%3E0%29%E4%B8%8A%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%BAG%28m%29%2C%E6%B1%82a%E6%BB%A1%E8%B6%B3%E7%9A%84%E6%9D%A1%E4%BB%B6)
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