COMEDK Exam 2014 Solved Paper

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Question : 126 of 180

Marks: +1, -0

If f:[0,∞)→[2,∞) is given by f(x)=x+‌

1

x

, then f−1(x) equals

‌
x+√x2−4
2
‌
x
1+x2
‌
2x−√x2−4
2
1+√x2−4

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