9.1 Integration by Parts & Tabular Integration Rita Korsunsky
Integration by Parts Product Rule :
Rules for Choosing u & dv ∫ udv = uv - ∫ vdu u u dv Rules for choosing u and dv: For dv: Choose the most complicated integrand that can be readily integrated For u: Choose something that becomes simpler when differentiated
Example #1 possible choices for dv: dx, x dx, e2x dx, xe2x dx Plug In Most complicated that can be readily integrated: e2x dx Plug In
Example #2 Plug In
Example #3 Plug In
Use integration by parts again Example #4 Use integration by parts again Plug In Plug In
Use integration by parts again Example #5 Use integration by parts again
Example #5 cont'd. Plug into original equation
Example #6 Use identity: Plug In
Tabular Integration can be used only if f(x) is a polynomial. Take the derivative of f(x) until you reach ZERO Then take the integral of g(x) until the derivative of f(x) is ZERO
Example #1 Take the INTEGRAL Take the DERIVATIVE
Example #2
Integration by parts: OR Tabular integration
OR
THE END