The x-coordinates of a point on t line j...

The x-coordinates of a point on t line joining the points `Q(2,2,1)a n dR(5,1,-2)i s4.` Find its z-coordinate.

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The correct Answer is:

hence, the z-co-ordinate is: `(-2(2)+1)/(2 + 1)` i.e. `(-4 + 1)/(3)` i.e. -1.

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