1.

If the vector a=3 hat(j)+4 hat(k) is the sum of two vectors a_(1) and a_(2), vector a_(1) is parallel to b=hat(i)+hat(j) and vector a_(2) is perpendicular to b, then a_(1)=

Answer»

`1/2 (HAT(i)+hat(J))`
`1/3 (hat(i)+hat(j))`
`2/3 (hat(i)+hat(j))`
`3/2 (hat(i)+hat(j))`

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