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The integral of a constant is equal to the constant times the integral's variable
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$\left[te^{-t}x\right]_{0}^{4}$
Learn how to solve definite integrals problems step by step online. Integrate the function te^(-t) from 0 to 4. The integral of a constant is equal to the constant times the integral's variable. Evaluate the definite integral. Simplify the expression inside the integral.