已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是
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![已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是](/uploads/image/z/2518441-25-1.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dx%5E2%2B4x%28x%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E0%29%2C4x-x%5E2%28x%E5%B0%8F%E4%BA%8E0%29%2C%E8%8B%A5f%28a-2%29%2Bf%28a%29%3E0%2C%E5%88%99a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dx%5E2%2B4x%28x%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E0%29%2C4x-x%5E2%28x%E5%B0%8F%E4%BA%8E0%29%2C%E8%8B%A5f%28a-2%29%2Bf%28a%29%3E0%2C%E5%88%99a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF)
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已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是
已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是
已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是
已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是已知函数f(x)=x^2+4x(x大于等于0),4x-x^2(x小于0),若f(a-2)+f(a)>0,则a的取值范围是
a>√ 3-1 和 a