G
gvy_bin


Giải bất pt sau :
a/ [tex]\sqrt{x+1} + \sqrt{12-x} - \sqrt{(x+1)(12-x)} = -1[/tex]
b/ [tex]\mid \ x^2 - 2x \mid \ < 2x - 1[/tex]
a/ [tex]\sqrt{x+1} + \sqrt{12-x} - \sqrt{(x+1)(12-x)} = -1[/tex]
b/ [tex]\mid \ x^2 - 2x \mid \ < 2x - 1[/tex]
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