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Let vec u , vec v and vec w be vect...

Let ` vec u , vec v` and ` vec w` be vector such ` vec u+ vec v+ vec w= vec0` . If `| vec u|=3,| vec v|=4` and `| vec w|=5,` then find ` vec udot vec v+ vec vdot vec w+ vec wdot vec u` .

A

-25

B

0

C

25

D

47

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A
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