Question
If $$\sqrt 5 = 2.236{\text{,}}$$ Â then the value of $$\frac{1}{{\sqrt 5 }}$$ Â is = ?
Answer: Option B
$$\eqalign{
& = \frac{1}{{\sqrt 5 }} \cr
& = \frac{1}{{\sqrt 5 }} \times \frac{{\sqrt 5 }}{{\sqrt 5 }} \cr
& = \frac{{\sqrt 5 }}{5} \cr
& = \frac{{2.236}}{5} \cr
& = 0.447 \cr} $$
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$$\eqalign{
& = \frac{1}{{\sqrt 5 }} \cr
& = \frac{1}{{\sqrt 5 }} \times \frac{{\sqrt 5 }}{{\sqrt 5 }} \cr
& = \frac{{\sqrt 5 }}{5} \cr
& = \frac{{2.236}}{5} \cr
& = 0.447 \cr} $$
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