" If "|vec V_(1)+vec V_(2)|=|vec V_(1)-vec V_(2)|" and "V_(2)" is "

If |vec(V)_(1)+vec(V)_(2)|=|vec(V)_(1)-vec(V)_(2)|and V_(2) is finite, then

If |vec(V)_(1)+vec(V)_(2)|=|vec(V)_(1)-vec(V)_(2)|and V_(2) is finite, then

Find 3 -dimensional vectors vec v_ (1), vec v_ (2), vec v_ (3) satisfying vec v_ (1) * vec v_ (1) = 4, vec v_ (1) * vec v_ (2) = - 2, vec v_ (1) * vec v_ (3) = 6, vec v_ (2) * vec v_ (2) = 2, vec v_ (2) * vec v_ (3) = - 5, vec v_ (3) * vec v_ (3)

Let vec a,vec b, and vec c be non-zero vectors and vec V_(1)=vec a xx(vec b xxvec c) and vec V_(2)(vec a xxvec b)xxvec c . Vectors vec V_(1)andvec V_(2) are equal.Then vec a an vec b are orthogonal b.vec a and vec c are collinear c.vec b and vec c are orthogonal d.vec b=lambda(vec a xxvec c) when lambda is a scalar

If vec(v)_(1)+vec(v)_(2) is perpendicular to vec(v)_(1)-vec(v)_(2) , then

If vec(v)_(1)+vec(v)_(2) is perpendicular to vec(v)_(1)-vec(v)_(2) , then

If vec(u)= vec(a)- vec(b), vec(v)= vec(a) + vec(b) and |vec(a)| =|vec(b)|=2 , then |vec(u) xx vec(v)| =