Solutions to homework from section 14.2
#16
#18
(a)
<-12, -6, 12>
(b)
<2, 1, -2>
(c)
<-4/3, -2/3, 4/3>
#26
(x-2)
2
+ y
2
+ (z+3)
2
= 62
#30
center = (3, 5, -3)
radius = 3
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