CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2006

  • question_answer
    If the points (- 1, 2, - 3), (4, a, 1) and (b, 8, 5) are collinear, then a and b are respectively equal to:

    A)  5 and 5                

    B)         9 and 5

    C)  5 and 9                

    D)        \[-5\]and 9

    E)  5 and\[-9\]

    Correct Answer: C

    Solution :

    Note that for\[a=5,\text{ }b=9\] (4, a, 1) is mid point of\[(-1,2,-3)\]and (b, 8, 5) i.e., points are collinear \[a=5,b=9\]


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