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Question 3 A quadratic of the form y = ax, a > 0, y 4 y = ax2 touches the logarithmic function y = In x y = Inc as shown. a If the x-coordinate of the point of contact is b, explain why ab2 = In b and 2ab = b Deduce that the point of contact is (Ve, ? ). Find the value of a. If two curves touch then d Find the equation of the common tangent. they share a common tangent at that point