If \(\vec{a}, \vec{b}, \vec{c}\) are three vectors such that \(\vec{a}+ \vec{b}+\vec{c}=0\) and \(|\vec{a}|=2, |\vec{b}|=3, |\vec{c}|=5\) then the value of \(\vec{a} \ \bullet \ \vec{b} + \vec{b} \ \bullet \ \vec{c} + \vec{c} \ \bullet \ \vec{a}\) is:

If \(\vec{a}, \vec{b}, \vec{c}\) are three vectors such that \(\vec

1.	If \(\vec{a}, \vec{b}, \vec{c}\) are three vectors such that \(\vec{a}+ \vec{b}+\vec{c}=0\) and \(\|\vec{a}\|=2, \|\vec{b}\|=3, \|\vec{c}\|=5\) then the value of \(\vec{a} \ \bullet \ \vec{b} + \vec{b} \ \bullet \ \vec{c} + \vec{c} \ \bullet \ \vec{a}\) is:
A.	0
B.	1
C.	-19
D.	38
Answer» D. 38

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If \(\vec{a}, \vec{b}, \vec{c}\) are three vectors such that \(\vec{a}+ \vec{b}+\vec{c}=0\) and \(|\vec{a}|=2, |\vec{b}|=3, |\vec{c}|=5\) then the value of \(\vec{a} \ \bullet \ \vec{b} + \vec{b} \ \bullet \ \vec{c} + \vec{c} \ \bullet \ \vec{a}\) is:

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