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UPSC NDA II 2018 Mathematics Solved Paper

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Question : 3

Total: 120

Consider the following expressions:
1. x+x2−‌‌

2.√ax2+bx+x−c+‌‌

3. 3x2−5x+ab
4. ‌‌

Which of the above are rational expressions?

1, 4 and 5 only
1, 3, 4 and 5 only
2, 4 and 5 only
1 and 2 only

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