If a = 2i + 5j + 6k, b = -2i + 3j + 2k then the magnitude of a - b is

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

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 + j + k, b = 2i - 3j + k then a xx b is

If a = 3i - 2j + k and b = i + 2j + 5k, then the unit vector along a - b is

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

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