If vectors 2i^+2j^-2k^, 5i^+yj^+k^ and -i^+ 2j^+2k^. are coplanar, the value of y is :

If vectors 2i^+2j^-2k^, 5i^+yj^+k^ and -i^+ 2j^+2k^. are coplanar, the value of y is :

  1. A

    81

  2. B

    36

  3. C

    23

  4. D

    9

    Register to Get Free Mock Test and Study Material

    +91

    Verify OTP Code (required)

    I agree to the terms and conditions and privacy policy.

    Solution:

    For coplanar vectors A.B×C=0
    =2225y1122
    =22y2210+1210+y=0
    =y=23

    Chat on WhatsApp Call Infinity Learn

      Register to Get Free Mock Test and Study Material

      +91

      Verify OTP Code (required)

      I agree to the terms and conditions and privacy policy.