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| 1. |
What is the area of the parallelogram whose sides are vectors 2overset^i+overset^j and 2overset^j+overset^k ? |
| Answer» SOLUTION :`overset^i+2overset^j+overset^k` are `2overset^i+3overset^j+alphaoverset^k` are PERPENDICULAR. `RARR(overset^i+2overset^j+overset^k)`.`(2overset^i+3overset^j+alphaoverset^k)=0rArr2+6+alpha=0rArralpha=-8` | |