일반물리학 1 — Vectors: Problem 27

27 If \(\vec{d}_1 + \vec{d}_2 = 5\vec{d}_3\), \(\vec{d}_1 - \vec{d}_2 = 3\vec{d}_3\), and \(\vec{d}_3 = 2\hat{i} + 4\hat{j}\), then what are, in unit-vector notation, (a) \(\vec{d}_1\) and (b) \(\vec{d}_2\)?