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This USUB practice only focuses on picking the correct U and knowing what form it will be in after the substitution.
Link to the practice and the solutions are on the second page.
Khan Academy videos and practice quizzes.
Link
24 USUB practice questions in 3 different difficulties:
1) solve for du given u.
2) usub when you are told u.
3) usub when you have to pick u.
Link to the practice and the solutions are on the second page.
USUB MATCHING PRACTICE:
Link
Google Sites
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