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If vec aa n d vec b are any two vectors...

If ` vec aa n d vec b` are any two vectors of magnitudes 2 and 3, respectively, such that `|2( vec axx vec b)|+|3( vec adot vec b)|=k ,` then the maximum value of `k` is `sqrt(13)` b. `2sqrt(13)` c. `6sqrt(13)` d. `10sqrt(13)`

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