Oy= 7x +2 QUESTION 4 For the curve y ax+ bx + 12x - 7, what values of a and b will make the tangents to the curve at x 2 and x = 3 horizontal? 3 a=- -, b=- a=-, b=- 5 3 3 a=-, b= - 2. 15 3/2 223

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