u=i+j v=ai-j they are parallel and I need to solve for a I have no idea how to do it and any help would be greatly appriciated
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Parallel vectors are multiples of each other. Does work? WHY?
thanks a lot . i see that it works because then you have 2=-2, but i don't understand how you get it...
Originally Posted by carly_1026 thanks a lot . i see that it works because then you have 2=-2, but i don't understand how you get it... Two vectors and are collinear (vulgo parallel) if Therefore: From the last equation you get: k = -1 . Plug in this value into the equation ki = ai and you'll get a = -1
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