Identify integral: Identify the integral to be solved.We need to evaluate the integral of the function −xln(−2x) with respect to x.I=∫−xln(−2x)dx
Use integration by parts: Use integration by parts.Integration by parts formula is ∫udv=uv−∫vdu, where u and dv are parts of the integrand.Let u=ln(−2x) and dv=−xdx. Then we need to find du and v.
Differentiate and integrate: Differentiate u and integrate dv. Differentiating u with respect to x gives us du=(1/x)dx. Integrating dv with respect to x gives us v=−x2/2.
Apply integration by parts: Apply the integration by parts formula.Now we can apply the integration by parts formula:I=uv−∫vduI=ln(−2x)⋅(−2x2)−∫(−2x2)⋅(x1)dx
Simplify integral: Simplify the integral.Simplify the integral by canceling x in the second term:I=−2x2⋅ln(−2x)−∫(−2x)dx
Integrate remaining term: Integrate the remaining term.The integral of −2x with respect to x is −4x2.I=−2x2⋅ln(−2x)+4x2+C, where C is the constant of integration.
Combine and write final answer: Combine the terms and write the final answer.The final answer is:I=−2x2⋅ln(−2x)+4x2+C
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