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Homework Help: A quick derivative question

  1. Mar 11, 2012 #1
    1. The problem statement, all variables and given/known data

    What is the derivative of 14x^2?


    2. Relevant equations



    3. The attempt at a solution

    Do i bring the 2 in front to get 28x? Or do I use the chain rule?
     
  2. jcsd
  3. Mar 12, 2012 #2
    28x is the correct answer. Technically you always use the chain rule including in this case. Think about it: derivative of (14x^2) is 28x and derivative of x is 1. So by chain rule, the answer is (28x)(1) = 28x.
     
  4. Mar 12, 2012 #3
    cool beans
     
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