Consider the following expressions :

1.  x + x² – 1/x

2 . √(ax² + bx + c – d/x + e/x²)

3. 3x² – 5x + ab

4. 2/(ax + b³)

5. 1/x – 2/(x + 5)

Which of the above are rational expressions ?

Mathematics 2018 NDA Mathematics 2018 NDA 2018

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