# Question #fa606

##### 1 Answer
Apr 13, 2017

D. The set of real number less than 4.

#### Explanation:

As x approaches $+ \infty$, $- {3}^{x} + 4$ approaches $- \infty$
As x approaches $- \infty$, $- {3}^{x} + 4$ approaches 4

Therefore, the answer is your selection D. The set of real numbers less than 4.