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THREE DIMENSIONAL GEOMETRY - NCERT
THREE DIMENSIONAL GEOMETRY 225 ... Example 4 The x-coordinate of a point on the line joining the points Q (2, 2, 1) and R (5, 1, –2) is 4. Find its z-coordinate. Solution Let the point P divide QR in the ratio λ: 1, then the co-ordinate of P are 5 2 2 –2 1, , 1 1 1
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