Question

EXERCISE 122
Find the distance between the following pairs of points:
(1) (2,3,5) and (4,3,1)
(i) (-3,7, 2) and (2, 4, -1)
(i) (-1,3,-4) and (1, -3,4) (iv) (2, -1,3) and (-2,1,3).
Show that the points (-2, 3, 5), (1, 2, 3) and (7,0,-1) are collinear.
Verify the following: 1+2
(1) (0, 7.--10), (1, 6, -6) and (4,9,-6) are the vertices of an isoscelest
icht angled​

Answer 1

Answer:

1. ✓20
2. ✓43
3. ✓104

Step-by-step explanation:

1. √(4-2)²+(3-3)²+(5-1)²

=√2²+0+4²

=√4+16=√20

2. √(2+3)²+(4-7)²+(-1-2)²

=√5²+3²+(-3)²

=√25+9+9

=√43

3.√(1+1)²+(-3-3)²+(4+4)²

=√2²+6²+8²

=√4+36+64

=√104