Use the formal definition to find the derivative of f(x)equalsStartFraction 2 Over x plus 1 EndFraction at xequalsnegative 6. Question content area bottom Part 1 Find f prime left parenthesis negative 6 right parenthesis. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. f prime left parenthesis negative 6 right parenthesisequals enter your response here (Type an integer or a fraction.) B. The derivative does not exist