22、定义sgn(x)={1,x>0;0,x=0;-1,x<0},若已知函数f(x)=a^x-[(sgn(x))/(a^|x|)](a>0,a≠1)满足f(1)=3/2.(1)解不等式f(x)≤2(2)若若f(2t)+mf(t)+4≥0对于任意负实数t恒成立,求
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![22、定义sgn(x)={1,x>0;0,x=0;-1,x<0},若已知函数f(x)=a^x-[(sgn(x))/(a^|x|)](a>0,a≠1)满足f(1)=3/2.(1)解不等式f(x)≤2(2)若若f(2t)+mf(t)+4≥0对于任意负实数t恒成立,求](/uploads/image/z/10086293-29-3.jpg?t=22%E3%80%81%E5%AE%9A%E4%B9%89sgn%EF%BC%88x%EF%BC%89%3D%7B1%2Cx%EF%BC%9E0%EF%BC%9B0%2Cx%3D0%EF%BC%9B-1%2Cx%EF%BC%9C0%7D%2C%E8%8B%A5%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Da%5Ex-%5B%EF%BC%88sgn%EF%BC%88x%EF%BC%89%EF%BC%89%2F%EF%BC%88a%5E%7Cx%7C%EF%BC%89%5D%EF%BC%88a%EF%BC%9E0%2Ca%E2%89%A01%EF%BC%89%E6%BB%A1%E8%B6%B3f%EF%BC%881%EF%BC%89%3D3%2F2.%EF%BC%881%EF%BC%89%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8Ff%EF%BC%88x%EF%BC%89%E2%89%A42%EF%BC%882%EF%BC%89%E8%8B%A5%E8%8B%A5f%EF%BC%882t%EF%BC%89%2Bmf%EF%BC%88t%EF%BC%89%2B4%E2%89%A50%E5%AF%B9%E4%BA%8E%E4%BB%BB%E6%84%8F%E8%B4%9F%E5%AE%9E%E6%95%B0t%E6%81%92%E6%88%90%E7%AB%8B%2C%E6%B1%82)
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