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Multiple Choice
Evaluate the integral. (Use c for the constant of integration.)
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Verified step by step guidance
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Step 1: Recognize that the integral ∫ w ln(w) dw requires the use of integration by parts. Recall the formula for integration by parts: ∫ u dv = uv - ∫ v du.
Step 2: Choose u = ln(w) and dv = w dw. This choice is made because the derivative of ln(w) simplifies to 1/w, and the integral of w dw is straightforward.
Step 3: Compute du and v. Differentiate u to get du = (1/w) dw. Integrate dv to get v = w^2 / 2.
Step 4: Substitute into the integration by parts formula. Using ∫ u dv = uv - ∫ v du, substitute u = ln(w), v = w^2 / 2, and du = (1/w) dw. This gives: ∫ w ln(w) dw = (w^2 / 2) ln(w) - ∫ (w^2 / 2)(1/w) dw.
Step 5: Simplify the remaining integral. The term ∫ (w^2 / 2)(1/w) dw simplifies to ∫ w/2 dw. Compute this integral and combine all terms, adding the constant of integration c at the end.