To find the integral of a function, we need to use a numerical integration method or a symbolic computation library. In this case, we will use the sympy library in Python to compute the definite integral of the function \( e^x \) from 3 to 7.
Step 1: Define the Integral
We are tasked with finding the definite integral of the function \( e^x \) over the interval from 3 to 7. This can be expressed as:
\[
\int_{3}^{7} e^x \, dx
\]
Step 2: Compute the Antiderivative
The antiderivative of \( e^x \) is itself, \( e^x \). Therefore, the indefinite integral of \( e^x \) is:
\[
\int e^x \, dx = e^x + C
\]
where \( C \) is the constant of integration.
Step 3: Evaluate the Definite Integral
To find the definite integral from 3 to 7, we evaluate the antiderivative at the upper and lower limits and subtract:
\[
\left[ e^x \right]_{3}^{7} = e^7 - e^3
\]
Step 4: Simplify the Expression
The result of the definite integral is:
\[
e^7 - e^3
\]
This expression represents the exact value of the integral.