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Given veca = 2hati + hatj - 8 hatk and v...

Given `veca = 2hati + hatj - 8 hatk` and `vecb = hati + 3hatj - 4hatk` then `|veca + vecb|` = ……………………… .

A

13

B

`(13)/(3)`

C

`4/(13)`

D

`3/(13)`

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