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
问题描述:
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
答
1.1/|x|>x => x≠0,x|x|0 => x² 0 x1=-1;x2=3 => a=-1 b=2
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