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123conheo


Cho a= $\sqrt[3]{7+ 5\sqrt{2}}$ - $\frac{1}{7+ 5\sqrt{2}}$
Tính : [TEX]A =\frac{a^3 +3}{2}[/TEX]
Chú ý latex
Tính : [TEX]A =\frac{a^3 +3}{2}[/TEX]
Chú ý latex
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