Question

$L_1: γ^-=(i+2j+3k)+λ(i-j+k)$;
$L_2: γ^-=(4i+5j+6k)+μ(i+j-k)$,
intersect $L_1$ and $L_2$ at P and Q respectively. If $(α, β, γ)$ is the mid point of the line segment PQ, then $2(α, β, γ$) is equal to

Answer 1

The answer is $(1, 2, 3)$.