Let vec(a), vec(b) and vec(c ) be three vectors such that vec(a) + vec(b) + vec(c ) = 0. If |vec(a)|=3, |vec(b)|=4, |vec( c)|=5, then the value of [(vec(a).vec(b)) + (vec(b).vec( c)) + vec(c ) .vec(a))] is -5^(n) find n

Let vec(a), vec(b) and vec(c ) be three vectors such that vec(a) + vec

1.	Let vec(a), vec(b) and vec(c ) be three vectors such that vec(a) + vec(b) + vec(c ) = 0. If \|vec(a)\|=3, \|vec(b)\|=4, \|vec( c)\|=5, then the value of [(vec(a).vec(b)) + (vec(b).vec( c)) + vec(c ) .vec(a))] is -5^(n) find n
Answer» ANSWER :2