Answers

  • Brainly User
2016-06-03T11:29:32+08:00
The first one x² - 1 is not a rational expression.

However, x⁻¹  is rational because it has a negative exponent.  Its equivalent rational expression is:
   
         \frac{1}{x}

where x ≠ 0, otherwise it will make the expression undefined.

ANSWER:   \frac{1}{x}

{x/x ≠ 0}

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