Mathematics

Problem

Vectors

\mathbf{a} = \hat{i} + 2\hat{j} + 3\hat{k}

\mathbf{b} = 2\hat{i} - \hat{j} + \hat{k}

and

\mathbf{c} = 3\hat{i} + \hat{j} + 4\hat{k}

are so placed that the end point of one vector is the starting point of the next vector. Then the vectors are a. not coplanar b. coplanar but cannot form a triangle c. coplanar and form a triangle d. coplanar and can form a right angled triangle

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