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Tìm GTLN,GTNN
A=[TEX]\frac{x^2+1}{x^2-x+1}[/TEX]
B=[TEX]\frac{8x+3}{4x^2+1}[/TEX]
C=[TEX]\frac{27-12X}{X^2+9}[/TEX]
D=[TEX]\frac{2x+1}{x^2+2}[/TEX]
E=[TEX]\frac{2x^2+10x+3}{3x^2+2x+1}[/TEX]
F=[TEX]\frac{X^2-x+1}{x^2+x+1}[/TEX]
H=[TEX]\frac{x+1}{x^2+x+1}[/TEX]
G=[TEX]\frac{3+4x^2+3x^4}{(1-x^2)^2}[/TEX]
K=[TEX]\frac{2x^2+x+1}{x^2-x+1}[/TEX]
A=[TEX]\frac{x^2+1}{x^2-x+1}[/TEX]
B=[TEX]\frac{8x+3}{4x^2+1}[/TEX]
C=[TEX]\frac{27-12X}{X^2+9}[/TEX]
D=[TEX]\frac{2x+1}{x^2+2}[/TEX]
E=[TEX]\frac{2x^2+10x+3}{3x^2+2x+1}[/TEX]
F=[TEX]\frac{X^2-x+1}{x^2+x+1}[/TEX]
H=[TEX]\frac{x+1}{x^2+x+1}[/TEX]
G=[TEX]\frac{3+4x^2+3x^4}{(1-x^2)^2}[/TEX]
K=[TEX]\frac{2x^2+x+1}{x^2-x+1}[/TEX]
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