1.
If a=i^+2j^+k^\vec{a} = \hat{i} + 2\hat{j} + \hat{k}, b=3(i^j^+k^)\vec{b} = 3(\hat{i} - \hat{j} + \hat{k}) and c\vec{c} is a vector such that a×c=b\vec{a} \times \vec{c} = \vec{b} and ac=3\vec{a} \cdot \vec{c} = 3, then (c×b)c|(\vec{c} \times \vec{b}) \cdot \vec{c}| is equal to