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The integral of a function times a constant ($-131$) is equal to the constant times the integral of the function
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$-131\int xe^{3x}dx$
Learn how to solve problems step by step online. Find the integral int(-131xe^(3x))dx. The integral of a function times a constant (-131) is equal to the constant times the integral of the function. We can solve the integral \int xe^{3x}dx 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.