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7-27.

Differentiate each function.

  1.  

    Chain rule.
    or rewrite as and use the Power Rule.

  2.  

    Recall that the derivative of is .

  3.  

    Do you see the pattern?
    Notice that all three of these problems ask you to differentiate composite functions with an 'inner' function that has a coefficient of .
    Compare and contrast their derivatives.