The vectors a→$$=i^+j^+mk^$$, b→$$=i^+j^+(m+1)k^$$ and c→$$=i^$$−$$j^+mk^$$ are coplanar if m is $$=$$

Correct option is 4None of these

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$The vectors \vec{a} = \hat{i} + \hat{j} + m \hat{k}, \vec{b} = \hat{i} + \hat{j} + (m + 1) \hat{k} and \vec{c} = \hat{i} - \hat{j} + m \hat{k} are coplanar if m is =$

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Correct option is D

a→,b→,c→ are coplanar if 11m11m+11-1m=0⇒10m10m+11-2m=0 c2→c2−c1⇒2=0 So there is no value of m for which the vectors are coplanar.

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The vectors a→=i^+j^+mk^, b→=i^+j^+(m+1)k^ and c→=i^−j^+mk^ are coplanar if m is =

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$The vectors \vec{a} = \hat{i} + \hat{j} + m \hat{k}, \vec{b} = \hat{i} + \hat{j} + (m + 1) \hat{k} and \vec{c} = \hat{i} - \hat{j} + m \hat{k} are coplanar if m is =$