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Math Help - First Derivative of the ln of a number

  1. #1
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    First Derivative of the ln of a number

    I know what f1 of lnx is (1/x) but is the first derivative of ln1 or ln5 or whatever number 0? or is it 1/1, 1/5 etc.?
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  2. #2
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    The derivative of a constant is always zero.
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    Thank You.
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