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2. Two vectors are given by a = (4.0 m)i – (3.0 m)j+ (1.0 m)k and
6= (-1.0 m)î + (1.0 m)j+ (4.0 m)k. What is the
(a) magnitude of a + 6?
(b) In unit-vector notation, find:
i. ā +5,
ii. ā – 6, and
iii. a third vector such that a -6+= 0 ?

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