Find the initial point P of a nonzero vector u = PQ with ter- minal point Q(3, 0, -5) and such that a. u has the same direction as v = (4, -2, -1). b. u is oppositely directed to v = (4, -2, -1).

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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**7. Find the initial point \( P \) of a nonzero vector \( \mathbf{u} = \overrightarrow{PQ} \) with terminal point \( Q(3, 0, -5) \) and such that**

   **a. \( \mathbf{u} \) has the same direction as \( \mathbf{v} = (4, -2, -1) \).**
   
   **b. \( \mathbf{u} \) is oppositely directed to \( \mathbf{v} = (4, -2, -1) \).**
Transcribed Image Text:**7. Find the initial point \( P \) of a nonzero vector \( \mathbf{u} = \overrightarrow{PQ} \) with terminal point \( Q(3, 0, -5) \) and such that** **a. \( \mathbf{u} \) has the same direction as \( \mathbf{v} = (4, -2, -1) \).** **b. \( \mathbf{u} \) is oppositely directed to \( \mathbf{v} = (4, -2, -1) \).**
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