Given the piecewise function y = { sqrt(-x), -4 ≤ x ≤ 0, sqrtx ,0 < x ≤ 4y={x,4x0,x,0<x4, how do you find the domain?

1 Answer
Nov 10, 2015

The Domain is the set of all values of xx fro which the function is defined; in this case the domain is [-4,+4][4,+4]

Explanation:

Given
color(white)("XX")y = {(sqrt(-x)" for "-4 <= x <=0), (sqrt(x)" for "0 < x <=4)}XXy={(x for 4x0),(x for 0<x4)}

The first element of this set definition defines the function for all values of x in [-4,0]x[4,0]

The second element in this set definition defines the function for all values of x in (0,+4]x(0,+4]

Togheter they define the function for all values of x in [-4,+4]x[4,+4]