Figure shows three vectors `vec(a), vec(b)` and `vec(c)`, where R is the midpoint of PQ. Then which of the following relations is correct?

Figure shows three vectors veca, vecb and vecc , where R is the midpoint of PQ. Then which of the following relations is correct?

Figure shows three vectors veca, vecb and vecc where R is the midpoint of PQ. Then which of the following relations is correct?

Figure shows three vectors veca, vecb and vecc where R is the midpoint of PQ. Then which of the following relations is correct?

Let three vectors vec(a), vec(b) and vec(c ) be such that vec(a) xx vec(b) = vec(c), vec(b) xx vec(c) = vec(a) and |vec(a)| = 2 . Then which one of the following is not true ?

Let vec(a).vec(b) and vec(c ) be three mutually perpendicular vectors each of unit magnitude. If vec(A) = vec(a) + vec(b) + vec(c ),  vec(B) = vec(a)- vec(b) + vec(c ) and vec(C ) = vec(a) - vec(b) - vec(c ) , then which one of the following is correct?

If vec(A), vec(B) and vec(C ) are three vectors, then the wrong relation is :

If vec(A), vec(B) and vec(C ) are three vectors, then the wrong relation is :

Let vec a, vec b, vec c be unit vectors such that vec a + vec b + vec c = vec 0 . Which one of the following is correct?