Problem 674

 

Determine whether the three points P = (-1, -7, 3), Q = (2, -1,12), R = (5, 5, 21) are colinear by computing the distances between

pairs of points.

Distance from P to Q:……………..

Distance from Q to R:……………

Distance from P to R:……………

Are the three points colinear (y/n)?………..

 

Solution:-

 

Distance from P to Q.

3\sqrt14

Distance from Q to R.

3\sqrt{14}

Distance from P to R.

6\sqrt{14}

Are the three points colinear (y/n).

y

 

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