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## Step-by-step Solution

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The integral of a function times a constant ($3$) is equal to the constant times the integral of the function

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We can solve the integral $\int e^x\cdot xdx$ by applying integration by parts method to calculate the integral of the product of two functions, using the following formula

Learn how to solve integrals of exponential functions problems step by step online.

$3\int e^x\cdot xdx$

Learn how to solve integrals of exponential functions problems step by step online. Find the integral int(3e^xx)dx. The integral of a function times a constant (3) is equal to the constant times the integral of the function. We can solve the integral \int e^x\cdot xdx by applying integration by parts method to calculate the integral of the product of two functions, using the following formula. First, identify u and calculate du. Now, identify dv and calculate v.

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