MCQ
The value of $\frac{1}{\sqrt{8}-3\sqrt{2}}$ is:
- A$\frac{1}{\sqrt{2}}$
- B$\sqrt{2}$
- C$-\frac{1}{\sqrt{2}}$
- D$-\sqrt{2}$
✓
Answer
- $-\frac{1}{\sqrt{2}}$
Solution:
$\frac{1}{\sqrt{8}-3\sqrt{2}}$
$\Rightarrow\frac{1}{2\sqrt{2}-3\sqrt{2}}$
$\Rightarrow\frac{1}{-\sqrt{2}}\Leftrightarrow\frac{-1}{\sqrt{2}}$
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