A) \[2\sqrt{5}\]
B) \[4\]
C) \[2\]
D) \[\sqrt{5}\]
Correct Answer: B
Solution :
\[x=\sqrt{5}+2\Rightarrow \frac{1}{x}=\sqrt{5}-2\] \[x-\frac{1}{x}=\sqrt{5}+2-\sqrt{5}+2=4\]You need to login to perform this action.
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