1.

If the vectors _a^rarr=2overset^j-3overset^k and _b^rarr=2overset^j+aoverset^j+6overset^k are parallel, white the value ofalpha.

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SOLUTION :`|alphaoversetrarra|=2rArr|alpha||OVERSETRARRA|=2rArralpha=_pm(2)/|oversetrarra|`


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