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If P1P2 is perpendicular to P2P3, then the value of k is, where P1(k, 1, –1), P2(2k, 0, 2) and P3(2 + 2k, k , 1) |
3 -3 2 -2 |
3 |
Direction ratios of P1 P2 = <k, − 1, 3> direction ratios of P2 P3 = <2, k, − 1> Therefore 2k − k − 3 = 0 ⇒ k = 3 |
