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Question

If x+1x=2 then the positive value of x+1x will be

A
2
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B
2
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C
2+1
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D
1
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Solution

The correct option is B 2
Given: x+1x=2

(x+1x)2=(x)2+(1x)2+2x.1x=x+1x+2=2+2=4

Hence,

(x+1x)2 = 4

Taking square root on both the sides we get

x+1x=4=2

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