3 The relation y +7xy - 6x° = 14 defines y implicitly as a function of x. dy (i) Use implicit differentiation to find dx (ii) There are two lines tangent to the curve at the points on the curve where x = - 1. What is the sum of their slopes? ..... dy (i) dx (Simplify your answer.) (ii) The sum of the slopes is . (Simplify your answer.)

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