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which of these vectors are equal? (a) u=-I-2j and v =3i +4 (b) u =...

which of these vectors are equal?
(a) u=-I-2j and v =3i +4
(b) u = I +2j and V+ 2i +j
(c) u= 3i +j and v =4i-2j
(d)n u+-3i-j and -4i+2j?

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