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  1. O

    Changing bounds (integration by substitution)

    No, you can't take either one. You can try it out with a random definite integral; only one will give the correct answer.
  2. O

    Changing bounds (integration by substitution)

    Suppose my substitution was x = u^2 -1 When changing bounds, do I take u = +- sqrt(x+1) ? Explain why.
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