` a= x i + yj + 2k, b = i - j + k , c = i + 2j,(bara ^^ barb) = pi/2,a.c =4`

If a = 3i - 2j + k, b = 2i - 4j - 3k, c = -i + 2j + 2k then a + b + c =

I : If a = 3i - 2j + k, b = 2i - 4j - 3k, c = -i + 2j + 2k then a + b + c = 4i + 4j II : If a = i - j + 2k, b = 2i + 3j + k, c = i - k, then magnitude of a + 2b - 3c is sqrt(78)

If a = i- 2j + k, b = 2i + j - k, c = 4i + 4j + 3k then |(a xx b) xx c| =

If a = i - j + 2k, b = 2i + 3j + k, c = i - k , then magnitude of a + 2b-3c is

If a = i + j - 2k, b = -i + 2j + k, c = i - 2j + 2k, then a unit vector parallel to a + b + c =

The ascending order of the following (A) volume of the tertrahedron formed by 4i + 5j + k. - j + k. 3i + 9j + 4k, -4i + 4j + 4k (B) Volume of the parallelopiped with edges 2i + 3j + 4k. I + 2j - 2k, 3i - j + k (C ) |a xx (b xx c)| where a = 2i + 3j - 4k, b = i j + k, c = 4i + 2j + 3k (D) |(a xx b) xx c| where a = i - 2j + k, b = 2i + j - k, c = 4i + 2j + 3k

If a = 2i - j + 3k, b = -i + 4j - 2k, c = 5i + j + 7k and xa + yb = c then (x, y) =

If a = I + j - k, b = I - j + k, c = I - j - k then a xx (b xx c) =