A Particle in Equilibrium Is Acted Upon by Three Forces $4 \vec{i}+6 \vec{j}-9 \vec{k}$

Short Answer

A particle in equilibrium is acted upon by three forces, two of which have components $4 \vec{i}+6 \vec{j}-9 \vec{k}$ and $9 \vec{i}-4 \vec{j}+3 \vec{k}$ . The components of the third must be ------ $\underline{\vec{i}}+\ldots \vec{j}+\ldots \vec{k}$ .