physics

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Three vectors are given by = 4.5 + 2.5 - 2.0, = -1.0 - 4.0 + 5.0, and = 2.0 + 2.0 + 1.0. Find the following.
(a) a · (b*c )


(b) a· (b+c)


(c) a x( a+b)

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    I will be happy to critique your thinking.

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