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Question: im confused about parts e and f thanks...

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I’m confused about Parts (e) and (f).
Thanks

16. Consider the vector equation x = p + t(q-p), where p and q correspond to distinct points Pand Q in IR? or R3. (a) Show that this equation describes the line segment PQ as t varies from 0 to 1. (b) For which value of t is x the midpoint of PQ (c) Find the midpoint of PQ when P2,3) and (d) Find the midpoint of PQ when P (1, 0, 1) (e) Find the two points that divide PQ in part (c) into (f) Find the two points that divide PQ in part (d) into and what is x in this case? and Q (4, 1, -2). three equal parts. three equal parts
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