Q. 1 A4.5( 16 Votes )

# Find the equation

Given that we need to find the equation of the parabola whose focus is S(3, 0) and directrix(M) is 3x + 4y - 1 = 0.

Let us assume P(x, y) be any point on the parabola.

We know that the point on the parabola is equidistant from focus and directrix.

We know that the distance between two points (x1, y1) and (x2, y2) is .

We know that the perpendicular distance from a point (x1, y1) to the line ax + by + c = 0 is .

SP = PM

SP2 = PM2

25x2 + 25y2 - 150x + 225 = 9x2 + 16y2 - 6x - 8y + 24xy + 1

16x2 + 9y2 - 24xy - 144x + 8y + 224 = 0

The equation of the parabola is 16x2 + 9y2 - 24xy - 144x + 8y + 224 = 0

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