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Derivative as a vector?

  1. Jul 28, 2010 #1
    1. The problem statement, all variables and given/known data

    I believe it is no?
    I'm asked which equation has the greatest rate of change, first derivative, going back to the deffinition of derivative I would say yes...

    Well there are two equations I calculated the first derivative in one to be 2 and the other one to be -2... so if the derivative is a vector which my gut tells me it is then 2 would be the correct answer becasue it's greater in value than -2 but if the derivative is a scalar and only has direction the both answers have the greatest...

    I also have a hunch that technically speaking right the derivative has no width right and so therefore is neither a scalar or a vector so...

    please help which one has the greatest rate of change the one with the first derivative of 2 or -2... I don't know if it's a vector or not...

    THANK YOU!!!

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jul 28, 2010 #2
    Given an equation dependent on only one variable (say x), the derivative evaluated at a point for that equation is a scalar value, not a vector.

    The rate of change they are asking for seems to be "direction" independent and so in your case the two functions have equal rates of change.
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