1、设f(x)=ax^2+|bx|+1 (a,b属于R)(1)若f(-1)=0,且对任意实数x均有f(x)大于等于0成立,求f(x)的表达式(2)在(1)条件下,当想-2≤x≤2,g(x)=xf(x)-kx是增函数,求实数k的范围2、一直定义域为R
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![1、设f(x)=ax^2+|bx|+1 (a,b属于R)(1)若f(-1)=0,且对任意实数x均有f(x)大于等于0成立,求f(x)的表达式(2)在(1)条件下,当想-2≤x≤2,g(x)=xf(x)-kx是增函数,求实数k的范围2、一直定义域为R](/uploads/image/z/13300525-37-5.jpg?t=1%E3%80%81%E8%AE%BEf%28x%29%3Dax%5E2%2B%7Cbx%7C%2B1+%EF%BC%88a%2Cb%E5%B1%9E%E4%BA%8ER%EF%BC%89%EF%BC%881%EF%BC%89%E8%8B%A5f%28-1%29%3D0%2C%E4%B8%94%E5%AF%B9%E4%BB%BB%E6%84%8F%E5%AE%9E%E6%95%B0x%E5%9D%87%E6%9C%89f%EF%BC%88x%EF%BC%89%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E0%E6%88%90%E7%AB%8B%EF%BC%8C%E6%B1%82f%28x%29%E7%9A%84%E8%A1%A8%E8%BE%BE%E5%BC%8F%282%29%E5%9C%A8%281%29%E6%9D%A1%E4%BB%B6%E4%B8%8B%EF%BC%8C%E5%BD%93%E6%83%B3-2%E2%89%A4x%E2%89%A42%EF%BC%8Cg%EF%BC%88x%EF%BC%89%3Dxf%EF%BC%88x%EF%BC%89-kx%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%EF%BC%8C%E6%B1%82%E5%AE%9E%E6%95%B0k%E7%9A%84%E8%8C%83%E5%9B%B42%E3%80%81%E4%B8%80%E7%9B%B4%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BAR)
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