Question

What is the ratio in which the line joining the co-ordinates (1,2,3) and (-3,4,-5) divided by the xy plane?

Answer 1

Let us label the points A(2,3), B(4,-5), C(6,8) and D(-3,2)

Let us find the equations of AB and CD.

Equation of AB: [math]y - 3 \ = \frac{-5-3}{4-2}(x-2)[/math]

[math]y - 3 = -4(x -2)[/math]

y = -4x + 11 --------(1)

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