đại số

S

son_9f_ltv

[TEX]\large\Delta'=2-m^2 \ge 0[/TEX]

[TEX]\Leftrightarrow -\sqrt{2}\le m \le \sqrt{2}[/TEX]

để PT có ít nhất 1 nghiệm [TEX]\ge 0[/TEX]
[TEX]\Leftrightarrow \frac{-b'+\sqrt\large\Delta'}}{a}\ge 0\Leftrightarrow \frac{1+\sqrt{2-m^2}}{m+1}\ge 0\Rightarrow .......[/TEX]
 
Last edited by a moderator:
You must log in or register to reply here.
Top Bottom