# RATL 2 | Lesson 1 | Try This! (Rational Expressions)

1). Here are some non-examples of rational expressions. Why are these not rational expressions?

Hint: Keep in mind the definition of a polynomial.

a) $$\Large \frac{3-\sqrt{x}}{2+x}$$

b) $$\Large \frac{x+2}{4+\frac{1}{x}}$$

c) $$\Large \frac{x-4}{3-3}$$

d) $$2^x$$

2) Generate a list of attributes that keep an expression from being a rational expression.