<span>Divide by 3 and get x<1, so the answer is {x | x < 1}
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The domain and inverse of the function
is
Domain =
,

What is a function?
A function from A to B is a rule that assigns to each element of A a unique element of B. A is called the domain of the function and B is called the codomain of the function.
There are different operations on functions like addition, subtraction, multiplication, division and composition of functions.
The given function is

r(x) is not defined if x - 4 = 0
r(x) is not defined for x = 4
Domain =
,
Where
is the set of all real number
Let r(x) = y

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A negative number is not considered a whole number...so ur answer is -229
6-10+2 solve from left to right and your answer should be -2