[qquad [" Q12.If "|vec A timesvec B|=sqr...

[qquad [" Q12.If "|vec A timesvec B|=sqrt(3)vec A.vec B," then the value of "],[|vec A+vec B|" is "],[" a."(A^(2)+B^(2)+(AB)/(sqrt(3)))^((1)/(2))],[" b."A+B]],[[" (.) "],[" (."quad (A^(2)+B^(2)+sqrt(3)AB)^((1)/(2))],[" d."(A^(2)+B^(2)+AB)^((1)/(2))]]

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