If the some of a number and its reciprocal be 2 then number is = ?
B. 1
C. -1
D. 2
Answer: Option B
Solution (By Examveda Team)
$$\eqalign{ & x + \frac{1}{x} = 2 \cr & {x^2} + 1 = 2x \cr & {x^2} - 2x + 1 = 0 \cr & {\left( {x - 1} \right)^2} = 0 \cr & {\text{Then, }}x{\text{ = 1}} \cr} $$This Question Belongs to Arithmetic Ability >> Number System
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