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Tangents, velocities and other rates of change

  1. Jan 22, 2012 #1
    I really don't see how they went from step 1 to step 2 in this example. Any advice would help.

    Screenshot2012-01-22at81825PM.png
     
  2. jcsd
  3. Jan 23, 2012 #2
    I understand this problem now.
     
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