Question

Giúp câu d . e . f . g . h

Answer 1

\(2,\\ a,x=36\Leftrightarrow P=\dfrac{6+1}{6-2}=\dfrac{7}{4}\\ b,x=6-2\sqrt{5}\Leftrightarrow\sqrt{x}=\sqrt{5}-1\\ \Leftrightarrow P=\dfrac{\sqrt{5}-1+1}{\sqrt{5}-1-2}=\dfrac{\sqrt{5}}{\sqrt{5}-3}=\dfrac{5-3\sqrt{5}}{2}\\ c,x=\dfrac{2}{2+\sqrt{3}}=4-2\sqrt{3}\Leftrightarrow\sqrt{x}=\sqrt{3}-1\\ \Leftrightarrow P=\dfrac{\sqrt{3}-1+1}{\sqrt{3}-1-2}=\dfrac{\sqrt{3}}{\sqrt{3}-3}=\dfrac{3\left(\sqrt{3}+1\right)}{-6}=\dfrac{-\sqrt{3}-1}{2}\)

Answer 2

h: Ta có: \(x-7\sqrt{x}+10=0\)

nên x=25

Thay x=25 vào P, ta được:

\(P=\dfrac{5+1}{5-2}=\dfrac{6}{3}=2\)