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Question

If x+1x=2,x0 then value of x2+1x2 is equal to:

A
1
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B
2
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C
3
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D
4
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Solution

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

To find: x2+1x2

Solution: x+1x=2

squaring both sides, we get

(x+1x)2=22

x2+1x2+2=4

x2+1x2=2

x2+1x2=2.

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