If \( \vec{a}, \vec{b} \) are unit vectors such that \( |\vec{a}+\v...
If \( \vec{a}, \vec{b} \) are unit vectors such that \( |\vec{a}+\vec{b}|=1 \) and
\( \mathrm{P} \)
W \( |\vec{a}-\vec{b}|=\sqrt{3} \), then \( |3 \vec{a}+2 \vec{b}|= \)
(1) 7
(2) 4
(3) \( \sqrt{7} \)
(4) \( \sqrt{ } 19 \)
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