bat phuong trinh

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nhockthongay_girlkute

seesky said:
căn A>=B<=>............................?
căn A<=m <=>...........................?
giùp mình điền vào vs thanhks
Bấm để xem đầy đủ nội dung ...
[TEX]\sqrt{A}\geq B\Leftrightarrow\left[\begin{\left{A\geq 0}\\{B<0}}\\{\left{B\geq 0\\{A\geq B^2}[/TEX]
[TEX]\sqrt{A}\leq m\Leftrightarrow \left{A\geq 0\\{A\leq m^2[/TEX]
 
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