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(d) Find the unit vector which is parallel to the vector i ^ + j^ |
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Answer» ong>Explanation: Let a =−3 i +4 j
. Then, ∣ a ∣= 2 2 +(−1) 2
= 5
a is a = ∣ a ∣ a
. a = 5
1
(2 i − j
)= 5
2
i − 5
1
j
HENCE, required vector = 5 a =5( 5
2
i − 5
1
j
)=2 5
i − 5
j
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