λ के किस मान के लिये, निम्नलिखित सदिश समतलीय होंगे
(i) \(\overrightarrow{a}\) = \(2\hat{i} - \hat{j} + \hat{k}\), \(\overrightarrow{b}\) = \(\hat{i} + 2\hat{j} - 3\hat{k}\) तथा \(\overrightarrow{c}\) = \(3\hat{i}+ λ\hat{j} + 5\hat{k}\)
(ii) \(\overrightarrow{a}\) = \(\hat{i} - \hat{j} + \hat{k}\), \(\overrightarrow{b}\) = \(2\hat{i} + \hat{j} -\hat{k} \)तथा \(\overrightarrow{c}\) = \(λ\hat{i} - \hat{j} + λ\hat{k}\)