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UPSC NDA I 2016 Mathematics Solved Paper

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For the next two (2) items that follow :
Consider the equation x+|y|=2y

[NDA I 2016]

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Question : 25

Total: 120

Which of the following statements are not correct?
1. y as a function of x is not defined for all real x.
2. y as a function of x is not continuous at x=0.
3. y as a function of x is differentiable for all x.Select the correct answer using the code given below.

1 and 2 only
2 and 3 only
1 and 3 only
1,2 and 3

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