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2413 Calculus I Chapter 5(5) Integration by Substitution. Substitution is how we integrate something that came from a chain rule problem. Take the derivative of:. Inside function. Derivative of inside.
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Substitution is how we integrate something that came from a chain rule problem. Take the derivative of: Inside function Derivative of inside Note: You know substitution is needed when the integral contains an inside and an outside function.
Steps for Integration by Substitution u du Take the derivative and that is du Identify the inside function and call it u Re-write the integral substituting u & du Integrate: Substitute x back in:
Substitution – Extra or missing constants Extra Constants Identify u Find du Substitute u & du Integrate Substitute back
Identify u Find du Substitute u & du Integrate Substitute back
Substitute u & du Integrate Substitute back
Substitution – Extra variables Identify u Find du Extra variable Substitute u & du Integrate Substitute back
Substitution – Definite Integrals Identify u Find du Substitute u & du and change integral # Integrate Evaluate