1. (a) Find a and b so that the line y = -6x + 4 is a tangent to the graph of y = ax + bx at x = 1 [7 marks]
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1. (a) Find a and b so that the line y = -6x + 4 is a tangent to the graph of y = ax + bx at x = 1 [7 marks]
1. (a) Find a and b so that the line y = -6x + 4 is a tangent to the graph of y = ax + bx at x = 1 [7 marks]
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