7. A curve is described by the equation x + 4xy + y + 27 =...

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7. A curve is described by the equation x² + 4xy + y² + 27 = 0 dy (a) Find in terms of x and y. dx A point Q lies on the curve. The tangent to the curve at Q is parallel to the y-axis. Given that the x coordinate of Q is negative, (b) use your answer to part (a) to find the coordinates of Q. 7. A curve is described by the equation x² + 4xy + y² + 27 = 0 dy (a) Find in terms of x and y. dx A point Q lies on the curve. The tangent to the curve at Q is parallel to the y-axis. Given that the x coordinate of Q is negative, (b) use your answer to part (a) to find the coordinates of Q.

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