1解不等式:1/|x|>x 2已知不等式|ax+1|小于等于b的解集是[-1,3],求a b的值
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![1解不等式:1/|x|>x 2已知不等式|ax+1|小于等于b的解集是[-1,3],求a b的值](/uploads/image/z/1587564-36-4.jpg?t=1%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8F%EF%BC%9A1%2F%7Cx%7C%3Ex+2%E5%B7%B2%E7%9F%A5%E4%B8%8D%E7%AD%89%E5%BC%8F%7Cax%2B1%7C%E5%B0%8F%E4%BA%8E%E7%AD%89%E4%BA%8Eb%E7%9A%84%E8%A7%A3%E9%9B%86%E6%98%AF%5B-1%2C3%5D%2C%E6%B1%82a+b%E7%9A%84%E5%80%BC)
1解不等式:1/|x|>x 2已知不等式|ax+1|小于等于b的解集是[-1,3],求a b的值
1解不等式:1/|x|>x 2已知不等式|ax+1|小于等于b的解集是[-1,3],求a b的值
1解不等式:1/|x|>x 2已知不等式|ax+1|小于等于b的解集是[-1,3],求a b的值
1.1/|x|>x => x≠0,x|x|0 => x² 0 x1=-1;x2=3 => a=-1 b=2
1/|x|>x (1-x²)/丨x丨>0
1-x²>0
x²<1
1>x>-1(x≠0)