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    Matrix problem? Find the values of K for which A is singular?

    the matrix A is given by A= [2,1,K 1,K,-1 3,4,2] Find the values of K for which A is singular?
  2. M

    The illumination 9 m from the source is?

    A light source produces an illumination of 18 lumens per square meter at a distance of 3 m from the light source. The illumination 9 m from the source is a)6 b)180 c)2 d)60
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