Question

Find the domain of the rational expression: 3x+21

all real numbers except 4
all real numbers except -7
all real numbers except 0
all real numbers except -21

Answer 1

Answer: The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Domain: (−∞,∞)

Range: (−∞,∞)

Hope this helps! :)