20. Show that the points P(-2,3,5). Q(1,2,3)&R(7,0,-1) are collinear
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Answered by
0
Answer:
do it by modulas formula it is easy
Answered by
0
Answer:
Let point (−2,3,5),(1,2,3)and(7,0,−1) be denoted by P , Q , and R respectively.
by using distance formula d=
(x
2
−x
1
)
2
+(y
2
−y
1
)
2
+(z
1
−z
1
)
2
Point P,Q and R are collinear if they lie on a line.
PQ=
(1+2)
2
+(2−3)
2
+(3−5)
2
=
(3)
2
+(−1)
2
+(−2)
2
=
9+1+4
=
14
QR=
(7−1)
2
+(0−2)
2
+(−1−3)
2
=
(6)
2
0
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