Domain Is Negative Infinity

F g x f x 2 1 x 2.

Domain is negative infinity. Our final domain for this function is infinity 2 because negative infinity cannot be obtained and 2 is obtained because of the closed dot. Use infinity and negative infinity signs to express that the domain goes on infinitely in either direction. The rules outlined above apply to the uk and usa.

D indicates that you are talking about the domain and read as negative infinity to positive infinity is another way of saying that the domain is all real numbers. What are the domain and range of the function f x 3x 5. Domain is negative infinity positive infinity range is negative infinity positive infinity 4 the function is well defined for any x but for all real x you always get a positive y.

For f x x 2 the domain in interval notation is. Domain negative infinity postive infinity range bracket 0 postive infinity. Let f x 1 x.

When using interval notation domain and range are written as intervals of values. The domain of fog is negative infinity infinity but excludes 0. Always use not with infinity symbols.

Therefore both positive and negative infinity will always use parenthesis. We will use a union symbol for the example above because there is a break in the domain.