λ के किस मान के लिए सदिश \(\overrightarrow{a}\) तथा \(\overrightarrow{b}\) परस्पर लम्बवत् है
(i) \(\overrightarrow{a}\) = \(2\hat{i}+λ\hat{j}+\hat{k}\); \(\overrightarrow{b}\) = \(4\hat{i}-2\hat{j}-2\hat{k}\)
(i) \(\overrightarrow{a}\) = \(2\hat{i}+3\hat{j}+4\hat{k}\); \(\overrightarrow{b}\) = \(3\hat{i}+2\hat{j}-λ\hat{k}\)
