equation of stright line passing thru two points, vector multiplication, Prob19Chap1

steveb

Joined Jul 3, 2008
2,436
Hi

Please help me with the query(ies) in the attachment. It would be really kind of you. Thank you.

Regards
PG
OK, I see one question which is "what does the question 18 have to do with 19. In the part you highlighted, the question 18 result is used which the sum of the coefficients is set equal to zero.
 
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