$\mathbb{N}_0 = \{0,1,2,3,...\} $

Ex: $\frac{1}{3}, \frac{-5}{2}, \frac{7}{1} = 7$

Ex: $\sqrt{2}, \frac{17}{30}$

The real numbers include all the integers and rational numbers, but they also include more, the irrational numbers.

Complex Numbers are all things in the form $a + bi$ where $a$ and $b$ are real and $i = \sqrt{-1}.$

The complex numbers are very interesting and we'll talk about them more later in the course.

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