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Find the equation of a line passing thro...

Find the equation of a line passing throught the points A(0,6,-9) and B(-3,-63). If D is the foot of the perpendicular drawn from a point C(7,4,-1) on the line AB, then find the coordinates of D and the equation of line CD.

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The correct Answer is:
`(x+3)/(-1)=(y+6)/(-4)=(z-3)/(4);D(-1,2,-5),(x-7)/(4)=(y-4)/(1)=(z+1)/(2)`
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