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Three vectors veca, vec b and vec c sati...

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

Text Solution

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The correct Answer is:
`mu = (-21)/(2)`
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