m的取值范围是 m ≤ 2 。x > 3 ≥ m+1,m ≤ 3 - 1,m≤ 2;补充题1、展开 6x - 2 - 12x - 15≤ x - 4x + 28-3x≤ 45x≥ -15;2、15 - 7 - 5y < 2y + 5 - 3y-4y < -3y > 3/4;3、同乘以6,3( 2x + 1 ) - 2( x - 2 ) > 66x + 3 - 2x + 4 > 64x > -1x > -1/4;4、同乘以6,-2( 2x - 3 ) > 3( -3x - 2 )-4x + 6 > -9x - 65x > -12x > 12/5;