l-2al=-2a,则a的取值范围是················· A.a＞0 B.a≥0 c.a≤0 d.a＜0原因也写上

l-2al=-2a,则a的取值范围是················· A.a＞0 B.a≥0 c.a≤0 d.a＜0原因也写上
l-2al=-2a,则a的取值范围是················· A.a＞0 B.a≥0 c.a≤0 d.a＜0
原因也写上

l-2al=-2a,则a的取值范围是················· A.a＞0 B.a≥0 c.a≤0 d.a＜0原因也写上
c

那是2a什么啊

选D