Questions: Use transformations of the graph (y=e^x) to graph the function. Write the domain and range in interval notation.
(f(x)=e^x+1)
Transcript text: 18
Multiple Choice 1 point
Use transformations of the graph $y=e^{x}$ to graph the function. Write the domain and range in interval notation.
\[
f(x)=e^{x}+1
\]
Solution
Solution Steps
Step 1: Identify the Base Function
The base function given is \( y = e^x \). This is an exponential function with a horizontal asymptote at \( y = 0 \).
Step 2: Determine the Transformation
The function \( f(x) = e^x + 1 \) is a vertical shift of the base function \( y = e^x \). Specifically, it is shifted 1 unit upwards.
Step 3: Graph the Transformed Function
To graph \( f(x) = e^x + 1 \), take the graph of \( y = e^x \) and shift every point 1 unit upwards. The horizontal asymptote of the graph will also shift from \( y = 0 \) to \( y = 1 \).
Step 4: Determine the Domain
The domain of the function \( f(x) = e^x + 1 \) is the same as the domain of the base function \( y = e^x \), which is all real numbers. In interval notation, this is:
\[
(-\infty, \infty)
\]
Step 5: Determine the Range
The range of the function \( f(x) = e^x + 1 \) is all values greater than 1, since the graph is shifted 1 unit upwards. In interval notation, this is:
\[
(1, \infty)
\]