giúp mình vơí nha

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niemkieuloveahbu

[TEX]\blue \frac{1}{5}=\frac{8}{40},\frac{3}{8}=\frac{15}{40}\\ \Rightarrow 6\ so\ can\ tim:\\ \frac{9}{40},\frac{1}{4},\frac{11}{40},\frac{3}{10},\frac{13}{40},\frac{7}{20}\\ b,\\a+0,b+0,bc=5,27 \Rightarrow a,b,c[/TEX]
 
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