Set Up Integral: Let's start by setting up the integral that we need to evaluate:I=∫5xe(x+6)dxWe can see that this is an integration problem that requires the use of integration by parts, which is given by the formula ∫udv=uv−∫vdu, where u and dv are parts of the integrand that we choose.
Choose u and dv: Choose u and dv for the integration by parts. A good choice here is to let u=5x, because its derivative will be simpler, and dv=e(x+6)dx, because its integral is straightforward.So we have:u=5x, which means du=5dxdv=e(x+6)dx, which means v=e(x+6) since the derivative of dv0 is dv1.
Apply Integration by Parts: Apply the integration by parts formula:I=uv−∫vduSubstitute u, du, v, and dv into the formula:I=5x⋅e(x+6)−∫e(x+6)⋅5dx
Integrate Second Term: Now we integrate the second term:∫e(x+6)⋅5dx=5⋅e(x+6)So the integral becomes:I=5x⋅e(x+6)−5⋅e(x+6)
Simplify Expression: Simplify the expression by factoring out e(x+6):I=e(x+6)⋅(5x−5)
Add Constant of Integration: Finally, we can add the constant of integration, C, to our result:I=e(x+6)⋅(5x−5)+CThis is the indefinite integral of the given function.
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