maths
posted by Shane .
The position vector of the point A(3,4) relative to an origin O is a. (a) Express vector a or (OA) in terms of i and j. (b) Find the magnitude of a. (c) Find the unit vector in the direction of a.

(a) 3i+4j
(b) 5
(c) 3/5 i + 4/5 j
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