Question

The length of the line segment joining the points (1,-3) and (-2,1) is

Answer 1

Answer:

Correct option is

A

8

Given points.

A(1,−1,3)B(2,−4,11)

AB=(2−1,−4+1,11−3)≡(1,−3,8)

C(−1,2,3)D(3,−2,10)

CD=(3+1,−2−2,10−3)≡(4,−4,7) -Direction ratios.

Projection of AB on CD

Ref. image

=∣CD∣AB.CD

=42+42+72(1×4)+(−3×−4)+(8×7)

=814+12+56

=972

=8



Step-by-step explanation:

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Answer 2

use the distance formula you know it right substitute the numbers given finally u will get the answer