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Which of the following expressions are...

Which of the following expressions are meaningful? a. ` vec u.(vec vxx vec w)` b. `vec u. vec v. vec w` c. `( vec u vec v). vec w` d. ` vec uxx( vec v. vec w)`

A

`vecu.(vecv xx vecw)`

B

`(vecu.vecv).vecw`

C

`(vecu.vecv)vecw`

D

`vecu.(vecv xx vecw)`

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The correct Answer is:
B
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