線性代數›Ch7 內積空間
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19. 內積空間、正交基底
#LA-07-019易內積空間正交基底
  1. (9%) Let {u1,u2,u3}\{\mathbf{u}_1, \mathbf{u}_2, \mathbf{u}_3\} be an orthonormal basis for an inner product space VV. If x=c1u1+c2u2+c3u3\mathbf{x} = c_1\mathbf{u}_1 + c_2\mathbf{u}_2 + c_3\mathbf{u}_3 is a vector with the properties ∥x∥=5\|\mathbf{x}\| = 5, ⟨u1,x⟩=4\langle \mathbf{u}_1, \mathbf{x}\rangle = 4, and x⊥u2\mathbf{x} \perp \mathbf{u}_2, then what are the possible values of c1,c2,c3c_1, c_2, c_3?
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