Intervals

Exercises

1. Compute the distance between the following points of the real line $\mathbb{R}$:
   • a) -3, 5
   • b) $a$, $a^3$

   • c) $

     2+2t

     $, $t$

2. Write the following intervals as neighborhoods:
   • a) $(-3, 3)$
   • b) $(-5, 2)$