co tui mek

sua chua

A)6

kich liet bien dong

1) \(\left|x\right|-x=0\)

\(\Leftrightarrow\left|x\right|=x\)

\(\Leftrightarrow x\ge0\)

2) \(\left|x\right|+x=0\)

\(\Leftrightarrow\left|x\right|=-x\) hoặc \(\left|x\right|=x=0\)

\(\Leftrightarrow x\le0\). Vì n \(\in\) N nên n = 0

hihi mk la xu nu

song ngu: 5%

???????

1 .xa nhau = diep tu ngat quang

2. mot giac mo= diep tu chuyen tiep

sua lai:

1

vuon em cay quy du loai

co cam, co quyt, co xoai, co na

2

thieu nhi la tuoi hoc hanh

chung em phan day de thanh tro ngoan