The 2 vectors ĵ + k̂ and 3î − ĵ + 4k̂ represents the two sides AB and AC, respectively of a ΔABC. The length of the median through A is

1
\(\frac{\sqrt{34}}{2}\)
2
\(\frac{\sqrt{48}}{2}\)
3
\(\sqrt{18}\)
4
None of these

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