The P.V.'s of the vertices of a triangle are 2i+3j+4k, 4i+6j+3k, 3i +2j +3k P.V. of orthocentre is :

If the position vectors of the vertices of a triangle are 2i - j + k, i - 3j - 5k, 3i - 4j - 4k then it is

The P.V.'s of the vertices of a triangle are 2bar(i)+3bar(j)+4bar(k), 4bar(i)+6bar(j)+3bar(k), 3bar(i)+2bar(j)+3bar(k) P.V. of its orthocentre is

The P.V's of the vertices of a triangle are 2bar(i)+3bar(j)+4bar(k),4bar(i)+6bar(j)+3bar(k),3vec i+2bar(j)+3bar(k) P.V.of orthocenter is

The vectors 2i - 3j + k, I - 2j + 3k, 3i + j - 2k

The volume of the parallelopiped whose coterminal edges are 2i - 3j + 4k, I + 2j - 2k, 3i - j + k is

The vector area of the triangle with vertices I + j + k, I + j + 2k, I + 2j + k is

The perimeter of a triangle with sides 3i+4j+5k,4i-3j-5k and 7i+j is

If a = 2i + 3j + 6k, b = 3i - 6j + 2k, c = 6i + 2j - 3k then a xx b =

The points whose position vectors are 2i + 3j + 4k, 3i + 4j + 2k and 4i + 2j + 3k are the vertices of