Identify Integral: Let's start by identifying the integral we need to evaluate:I=∫−2xe(x+5)dxThis is an integration problem that can be solved using integration by parts, which is based on the formula ∫udv=uv−∫vdu, where u and dv are parts of the integrand chosen such that du and v can be easily computed.
Choose u and dv: Choose u and dv for the integration by parts. Let's let u=−2x, which means du=−2dx. Let dv=e(x+5)dx, which means v is the antiderivative of e(x+5), which is e(x+5) itself since the derivative of e(x+5) is e(x+5).
Apply Integration by Parts: Now we apply the integration by parts formula:∫−2xe(x+5)dx=uv−∫vdu= (−2x)e(x+5) - ∫e(x+5)(−2dx)
Simplify Integral: Simplify the integral:=−2xe(x+5)+2∫e(x+5)dxNow we need to integrate e(x+5) with respect to x, which is straightforward since the integral of e(x+5) is e(x+5).
Perform Integration: Perform the integration:2∫e(x+5)dx=2e(x+5)So the integral becomes:−2xe(x+5)+2e(x+5)
Combine Terms: Combine the terms to get the final answer:I=−2xe(x+5)+2e(x+5)+Cwhere C is the constant of integration.
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