## Precalculus: Mathematics for Calculus, 7th Edition

The interval notations changes from $$(−∞,6]∩(2,10)$$ to $$(−∞,6]$$
In the interval notation we noticed bracket an parenthesis Bracket means close circle Parenthesis means open circle (−∞,6]∩(2,10) the symbol ∩ means all the common elements between these interval notations. 1. The commomn elemnts are $(-\infty, 0,1,2,3,4,5,6]$ 2. The line will go from 6 (close circle•) to negative infinitive.