Section 12.2: Vectors
Exercise 21
Find \(\mathbf{a} + \mathbf{b}, 4\mathbf{a} + 2\mathbf{b}, |\mathbf{a}|,\) and \(|\mathbf{a} - \mathbf{b}|\). \(\mathbf{a} = 4\mathbf{i} - 3\mathbf{j} + 2\mathbf{k}, \mathbf{b} = 2\mathbf{i} - 4\mathbf{k}\)
Find \(\mathbf{a} + \mathbf{b}, 4\mathbf{a} + 2\mathbf{b}, |\mathbf{a}|,\) and \(|\mathbf{a} - \mathbf{b}|\). \(\mathbf{a} = 4\mathbf{i} - 3\mathbf{j} + 2\mathbf{k}, \mathbf{b} = 2\mathbf{i} - 4\mathbf{k}\)