Answers to Matched Problems in Domain and Range
The answers to the matched problems in Domain and Range of a Function are presented.

Matched Problem 1: Find the domain of
function f defined by
f (x) = 1 / ( x + 3)
Answer:
The domain of function f is the set of all values of x in the interval
(infinity , 3) U (3 , +infinity)
Matched Problem 2: Find the domain of function f defined by:
f (x) = sqrt (x + 9)
Answer:
The domain of function f is the set of all values of x in the interval
(infinity , 9 ]
Matched Problem 3: Find the domain of function f defined by:
f (x) = sqrt( x + 2) / [(x + 1)(x + 9)]
Answer:
The domain of function f is the set of all values of x in the interval
(infinity , 9) U (9 , 1) U (1 , 2]
Matched Problem 4: Find the range of
function f defined by:
f (x) = x^{ 2} + 3
Answer:
The range of function f is the set of all values of f(x) in the interval
[3 , +infinity)

