What is the range of the function ? Give your answer as an interval. Please enter your response in interval notation. Refer to Formatting Tips below for detailed instructions on formatting your response.
As x→∞, 51x→∞ and 2·51x→∞. Subtracting this from 3 gives values that approach -∞.
As x→-∞, 51x→0 and 2·51x→0. Subtracting this from 3 gives values that approach (but does not quite reach) 3.
The range is (-∞, 3)
? Give your answer as an interval. 
