What is the range of the given exponential function below? \( 3^{x}+2 \) \( (-\infty, \infty) \) \( (2, \infty) \) \( [2, \infty) \) \( (1, \infty) \)
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The Deep Dive
The exponential function \( 3^{x} \) always produces positive values, ranging from 0 to infinity as \( x \) changes. When you add 2 to this function, it shifts the entire output up by 2 units, meaning the lowest value it can take is 2 when \( x \) approaches negative infinity. This results in a range starting at 2 and extending to infinity. As a result, the range of the function \( 3^{x} + 2 \) is expressed as \([2, \infty)\). Isn’t it fascinating how just a little tweak can change everything? You can visualize this as raising the entire graph of \( 3^{x} \) upward!