(i) u=2i+3j+k\mathbf{u} = 2\mathbf{i} + 3\mathbf{j} + \mathbf{k}u=2i+3j+k, v=−i+2j+2k\mathbf{v} = -\mathbf{i} + 2\mathbf{j} + 2\mathbf{k}v=−i+2j+2k