Current location - Training Enrollment Network - Mathematics courses - Urgent for a detailed explanation of the fill-in-the-blank question 13 in the second model science mathematics volume of Shanghai Xuhui senior three.
Urgent for a detailed explanation of the fill-in-the-blank question 13 in the second model science mathematics volume of Shanghai Xuhui senior three.
(x+a)|x+a| >x|x|+a

1. When x>0, a> 1-2x, so a >: 1.

2. When x 0, so a>2.

3. when x