Question 1086542
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1.  {{{(f(x+h)-f(h))/h}}} = {{{(5-5)/h}}} = {{{0/h}}} = 0.



2.  I believe that your difference quotient is written incorrectly.


    The correct writing is  {{{(f(x+h) - f(x))/h}}}.


    This modified difference quotient is also equal to zero, exactly as the original one . . . 
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