Question

Let `vec(a), vec(b),vec(c)` be three non - coplanar vectors where ` vec(a) xx vec(b)xx vec(c), vec(beta) = vec(c ) xx vec(a) andvec(gamma) = vec(a) xx vec(b) `
` [ vec(beta) xx vec(gamma) , vec(gamma) xx vec(alpha) , vec(alpha) xx vec(beta)] `
` vec(a) xx vec(alpha) + vec(b) xx vec(beta)+vec(c)xx vec(gamma) ` is equal to -
A. `vec(0)`
B. ` [ vec(a)" " vec(beta)" " vec(gamma)]`
C. ` [ vec(a)" " vec(b)" " vec(c )] `
D. 0

Answer 1

Correct Answer - a