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Let A(4,7,8), B(2,3,4) and C(2,5,7) be the position vectors of the vertices of a `triangle ABC` the length of the internal bisectors of the angle of A is:
A. |
`3/2 sqrt34` |
B. |
`2/3 sqrt34` |
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C. |
`1/2 sqrt34` |
D. |
`1/3 sqrt34` |