Question: 4. [6 marks] For the function f(x) = 2 + x -6x + 14: N (a) Find the equation of the tangent line when x
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4. [6 marks] For the function f(x) = 2 + x -6x + 14: N (a) Find the equation of the tangent line when x = 0. [Note: You may use rules of differentiation.] (b) Find all values of a where the tangent line is horizontal
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