Vectors a→=i^+2j^+3k^,b→=2i^−j^+k^ and c→=3i^+j^+4k^ are so placed that the end point of one vector is the starting point of the next vector. Then the vectors are

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not coplanar

coplanar but cannot form a triangle

coplanar and form a triangle

coplanar and can form a right-angled triangle

answer is B.

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Detailed Solution

Note that a→+b→=c→

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