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The integral of a function times a constant ($2$) is equal to the constant times the integral of the function
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$2\int e^xdx$
Learn how to solve definite integrals problems step by step online. Integrate the function 2e^x from -infinity to 4. The integral of a function times a constant (2) is equal to the constant times the integral of the function. The integral of the exponential function is given by the following formula \displaystyle \int a^xdx=\frac{a^x}{\ln(a)}, where a > 0 and a \neq 1. Add the initial limits of integration. Replace the integral's limit by a finite value.