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[tex]1)VT=a^\frac{1}{2}.a^\frac{1}{2.3}.a^\frac{1}{2.3.4}=a^\frac{17}{24}\\VP=2^\frac{5}{24}.\frac{1}{2^\frac{-1}{2}}=2^\frac{17}{24}\\\Rightarrow VT=VP\Leftrightarrow a=2\\2)BT=\left [ \frac{(\sqrt{a}+\sqrt{b})(a+b-\sqrt{ab})}{(\sqrt{a}+\sqrt{b})(\sqrt{a}-\sqrt{b})}-(\sqrt{a}-\sqrt{b}) \right ].\frac{\sqrt{a}-\sqrt{b}}{\sqrt{ab}}\\=\frac{\sqrt{a}+\sqrt{b}-\sqrt{ab}-(\sqrt{a}-\sqrt{b})^2}{\sqrt{a}-\sqrt{b}}.\frac{\sqrt{a}-\sqrt{b}}{\sqrt{ab}}\\=1[/tex]
[TẶNG BẠN] TRỌN BỘ Bí kíp học tốt 08 môn
