If $\overrightarrow{a}, \overrightarrow{b}, \overrightarrow{c} $ are non-coplanar vectors and $\lambda$ is a real number, then <br> $[\lambda(\overrightarrow{a} + \overrightarrow{b}) \;\lambda^2 \overrightarrow{b} \;\lambda \overrightarrow{c} ] = [\overrightarrow{a} \overrightarrow{b} + \overrightarrow{c} \overrightarrow{b} ] $ for :