Please solve this problem

\int { \frac { { \left( x+3 \right) e }^{ x } }{ (x+5)^{ 3 } } dx }

#Calculus #Integration #IndefiniteIntegral

Note by Abhay Raj Singh
6 years, 2 months ago

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Comments

(x+3)ex(x+5)3dx \int { \frac { { \left( x+3 \right) e }^{ x } }{ (x+5)^{ 3 } } dx }

=(x+52)ex(x+5)3dx = \int \frac { ( x+5 - 2) e^x }{ (x+5)^3 } dx

=(x+5)ex(x+5)3dx+2ex(x+5)3dx = \int \frac { (x+5) e^x }{ (x+5)^3 } dx + \int \frac { - 2 e^x }{ (x+5)^3 } dx

=ex(x+5)2dx+2ex(x+5)3dx = \int \frac { e^x }{ (x+5)^2 } dx + \int \frac { - 2 e^x }{ (x+5)^3 } dx

Using IBP on the second integral withu=ex u = e^x and dv=2(x+5)3 dv = \frac{- 2}{(x+5)^3}

=ex(x+5)2dx+ex(x+5)2ex(x+5)2dx = \int \frac { e^x }{ (x+5)^2 } dx + \frac{e^x}{(x+5)^2} -\int \frac { e^x }{ (x+5)^2 } dx

=ex(x+5)2 = \frac{e^x}{(x+5)^2}

Siddhartha Srivastava - 6 years, 2 months ago

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thanx

Abhay Raj Singh - 6 years, 2 months ago
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