2.7.10 Function Properties

Condition: to explore the function for continuity, determine the type of gap points: \ [y = \ left \ {\ bein {array} {cc} x^{2} -x, & x <1 \\ 2-x, & 1 \ leq x \ leq 4 \\ \ frac {1} {x-4}, & x> 4 \ end {Array} \ Right. \]