1.

Vector bar(a)=6hati-3hatj,bar(b)=2hati-6hatj and bar( c )=-2hati+21hatj are such that bar(alpha)=bar(a)+bar(b)+bar( c ). The vector bar(alpha) is represented as …………….. A component of bar(a) and bar(b).

Answer»

`3BAR(a)-2BAR(B)`
`2bar(a)-3bar(b)`
`3bar(b)-2bar(a)`
NONE of these

ANSWER :B


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