Can someone fact check this for me? Here is the link to the PDF. In example #3, I literally cannot make the numbers come out the way the answer is given. I found two major mistakes, but I may be wrong:

1) I found Point Q = (3,0,0) NOT the given (1,0,0)

I worked the problem with both, and found the answer with (3,0,0) = 1/sqrt(6). With (1,0,0) = 3/sqrt(6).

2) Their math on the final step of the equation just doesn't make sense. Is it an error?

Question

Can someone fact check this for me?  Here is the link to the PDF.  In example #3, I literally cannot make the numbers come out the way the answer is given. I found two major mistakes, but I may be wrong:

1) I found Point Q = (3,0,0)  NOT the given (1,0,0)  

I worked the problem with both, and found the answer with (3,0,0) = 1/sqrt(6).  With (1,0,0) = 3/sqrt(6).  

2) Their math on the final step of the equation just doesn't make sense.  Is it an error?

anonymous · Answer

Hey. Can you repost the link and I'll see if I can help. It doesn't seem to be in the original post.

anonymous · Answer

Hey, forgot about this question.  I have been finding errors throughout the different problems answers.  Not worrying about the minor mistakes.