Sample Problem Answers.pdf - Integration by Substitution...

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Integration by SubstitutionSUGGESTED REFERENCE MATERIAL:As you work through the problems listed below, you should reference Chapter 5.3 of the rec-ommended textbook (or the equivalent chapter in your alternative textbook/online resource)and your lecture notes.EXPECTED SKILLS:Know how to simplify a “complicated integral” to a known form by making an appro-priate substitution of variables.PRACTICE PROBLEMS:For problems 1-21, evaluate the given indefinite integral and verify that youranswer is correct by differentiation.1.Z3x2(x3+ 3)3dx14(x3+ 3)4+C2.Z55x+ 3dxln|5x+ 3|+C3.Z2xcos (x2)dxsin (x2) +C4.Z4x(x2+ 6)2dx23(x2+ 6)3+C5.Zsec (4x) tan (4x)dx14sec (4x) +C6.Z(3x-5)9dx130(3x-5)10+C1

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