REX01 Introduction to Rational Expressions

By sipnayan in Algebra September 19, 2018

In this video, we learn the definition of rational numbers, rational expressions, and rational functions . Watch the Tagalog math tutorial video above and then answer the exercises below. The complete video playlist of the Sipnayan tutorials on Rational Expressions can be found here.

Practice Exercise

True or False

1.) The fraction $\frac{\pi}{3}$ is a rational number.

2.) The fraction $\frac{2x - 1}{5x + 1}$ is a rational expression.

3.) The fraction $\frac{\sqrt{x} + 3}{x^2 + 3}$ is a rational expression.

4.) The function $f(x) = \frac{1}{x}$ is a rational function.

5.) The fraction $\frac{3}{8}$ is a rational number.

Answers

1.False. The numerator and denominator of a rational number must be integers.
2. True
3. False. $\sqrt{x} + 3$ is not a polynomial expression.
4. True
5. True

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Tags: definition of rational expressions, definition of rational functions, definition of rational numbers, rational functions, rational numbers, rational numbres, tagalog math video

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