1.设f(x)=ax+2a+1,当X大于等于-1小于等于1时,f(x)的值有正也有负,则实数a的取值范围?2.已知函数f(x)=kx^2+2kx+1在闭区间-3,2 上的最大值为4,则K=?3.若函数f(x)在(-无穷,0)并(0,正无穷)上为奇函数,且
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![1.设f(x)=ax+2a+1,当X大于等于-1小于等于1时,f(x)的值有正也有负,则实数a的取值范围?2.已知函数f(x)=kx^2+2kx+1在闭区间-3,2 上的最大值为4,则K=?3.若函数f(x)在(-无穷,0)并(0,正无穷)上为奇函数,且](/uploads/image/z/14101611-51-1.jpg?t=1.%E8%AE%BEf%28x%29%3Dax%2B2a%2B1%2C%E5%BD%93X%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E-1%E5%B0%8F%E4%BA%8E%E7%AD%89%E4%BA%8E1%E6%97%B6%2Cf%28x%29%E7%9A%84%E5%80%BC%E6%9C%89%E6%AD%A3%E4%B9%9F%E6%9C%89%E8%B4%9F%2C%E5%88%99%E5%AE%9E%E6%95%B0a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%3F2.%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dkx%5E2%2B2kx%2B1%E5%9C%A8%E9%97%AD%E5%8C%BA%E9%97%B4-3%2C2+%E4%B8%8A%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%BA4%2C%E5%88%99K%3D%3F3.%E8%8B%A5%E5%87%BD%E6%95%B0f%28x%29%E5%9C%A8%EF%BC%88-%E6%97%A0%E7%A9%B7%2C0%EF%BC%89%E5%B9%B6%EF%BC%880%2C%E6%AD%A3%E6%97%A0%E7%A9%B7%EF%BC%89%E4%B8%8A%E4%B8%BA%E5%A5%87%E5%87%BD%E6%95%B0%2C%E4%B8%94)
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