Three vectors vec(a),vec(b) and vec( c ) satisfy the condition vec(a)+vec(b)+vec( c )=vec(0). Evaluate the quantity mu=vec(a).vec(b)+vec(b).vec( c )+vec( c ).vec(a), if |vec(a)|=1,|vec(b)|=4 and |vec( c )|=2.

Three vectors vec(a),vec(b) and vec( c ) satisfy the condition vec(a)

1.	Three vectors vec(a),vec(b) and vec( c ) satisfy the condition vec(a)+vec(b)+vec( c )=vec(0). Evaluate the quantity mu=vec(a).vec(b)+vec(b).vec( c )+vec( c ).vec(a), if \|vec(a)\|=1,\|vec(b)\|=4 and \|vec( c )\|=2.
Answer» ANSWER :`2mu=-21` i.e., `MU=(-21)/(2)`

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Three vectors vec(a),vec(b) and vec( c ) satisfy the condition vec(a)+vec(b)+vec( c )=vec(0). Evaluate the quantity mu=vec(a).vec(b)+vec(b).vec( c )+vec( c ).vec(a), if |vec(a)|=1,|vec(b)|=4 and |vec( c )|=2.

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