急求已知函数f(x)=(x+b)/(1+x²)为奇函数 ①求b的值并证明函数f(x)在区间(已知函数f(x)=(x+b)/(1+x²)为奇函数①求b的值并证明函数f(x)在区间(1,+∞)上是减函数②解关于x的不等式f(1+2x²
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![急求已知函数f(x)=(x+b)/(1+x²)为奇函数 ①求b的值并证明函数f(x)在区间(已知函数f(x)=(x+b)/(1+x²)为奇函数①求b的值并证明函数f(x)在区间(1,+∞)上是减函数②解关于x的不等式f(1+2x²](/uploads/image/z/1029587-59-7.jpg?t=%E6%80%A5%E6%B1%82%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D%EF%BC%88x%2Bb%EF%BC%89%2F%281%2Bx%26%23178%3B%29%E4%B8%BA%E5%A5%87%E5%87%BD%E6%95%B0+%E2%91%A0%E6%B1%82b%E7%9A%84%E5%80%BC%E5%B9%B6%E8%AF%81%E6%98%8E%E5%87%BD%E6%95%B0f%28x%29%E5%9C%A8%E5%8C%BA%E9%97%B4%28%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D%EF%BC%88x%2Bb%EF%BC%89%2F%281%2Bx%26%23178%3B%29%E4%B8%BA%E5%A5%87%E5%87%BD%E6%95%B0%E2%91%A0%E6%B1%82b%E7%9A%84%E5%80%BC%E5%B9%B6%E8%AF%81%E6%98%8E%E5%87%BD%E6%95%B0f%28x%29%E5%9C%A8%E5%8C%BA%E9%97%B4%281%2C%2B%E2%88%9E%29%E4%B8%8A%E6%98%AF%E5%87%8F%E5%87%BD%E6%95%B0%E2%91%A1%E8%A7%A3%E5%85%B3%E4%BA%8Ex%E7%9A%84%E4%B8%8D%E7%AD%89%E5%BC%8Ff%281%2B2x%26%23178%3B)
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