Question

What are the domain an range of function f(x)=3^x+5

Answer 1

D: all real numbers

R: (5, ∞)

Explanation:

D: you can plug in anything for x and it makes sense. You can raise 3 to any real power (2, 1/2, -10 etc) and get an answer.

R: Because 3^x only produces positive numbers, the range is (0+5, ∞) ---> (5, ∞).

Answer 2

Domain (-∞, ∞).

Range (5, ∞).

Explanation:

The domain is all real values of x or in interval notation (-∞, ∞).

The 3^x can only have a value greater than 0.

So the range is f(x) > 5.