The curve y = 7 - \(\frac{6}{x}\) and the line y + 2x - 3 = 0 intersect at two point. Finf the; (a) coordinates of the two points (b) equation of the perpendicular bisector of the line joining the two points
Explanation
(a) 7 - \(\frac{6}{x} = 3 - 2x\) Simplifying; \(x^2 + 2x - 2 = 0\) x = 1 or x = -3 Substituting for x; y = 3 - 2(1) = 3 - 2 = 1 or y = 3 - 2(-3) = 3 + 6 = 9 The coordinate of the two points are (x y) = (1, 1), (-3, 9)
(b) (\(\frac{1 - 3}{2}, \frac{1 + 9}{2}\)) = (-1, 5) The gradient of the point of intersection ; \(\frac{9 - 1}{-3 -1} = \frac{8}{-4}\) = -2 The gradient of the perpendicular bisector; \(\frac{1}{2}\) Thus, the equation of the perpendicular bisector; y - 5 = \(\frac{1}{2}\) (x + 1) Therefore, 2y - x - 11 = 0