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Let veca and vecb be two vectors such th...

Let `veca` and `vecb` be two vectors such that `|2 veca + 3 vecb| = |3 veca + vecb|` and the angle between `veca` and `vecb` is `60^(@)` . If `1/8 veca` is a unit vector, then `|vecb|` is equal to :

A

5

B

6

C

4

D

8

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