What does the ∩ symbol represent in math?

"∩" is called the union symbol. It's commonly used in engineering. The intersection of sets ‘A’ and ‘B’ is the set containing the unique elements from both set ‘A’ and set ‘B’. Thus, to create an intersection, elements found in both original sets, which are the duplicates discarded by the union operation.

the final function for the graph becomes x-2=-1. before graphing you solve the equation, where x=1. then graph accordingly.   ( on the x-axis, 1 on the line will possess a vertical line.)

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5