+0  
 
0
94
1
avatar+946 

So I'm thinking we use the point P and the origin O Which would be (0,0,0) subtract or add them (not sure) and somehow find the OE. Any help? 

Julius  May 3, 2018
 #1
avatar+88871 
+2

Notice  that we can  write  (5, 2, 4)  as the linear combination

 

1(5, 0, 0)  + 1(0, 2 , 0)  + 1(0, 0, 4)   =   vector (OE)  +vector( ED)   + vector (DP)

 

So......the length of  OE   =    5

 

 

cool cool cool

CPhill  May 4, 2018

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