Direction ratio of line joining (2, 3, 4) and (−1, −2, 1), are: A. (−3, −5, −3) B. (−3, 1, −3) C. (−1, −5, −3) D. (−3, −5, 5)

Direction ratio of line joining (2, 3, 4) and (−1, −2, 1), are:

A. (−3, −5, −3)

B. (−3, 1, −3)

C. (−1, −5, −3)

D. (−3, −5, 5)

Solutions

Expert Solution

Answer : A. (−3, −5, −3)

Explanation :

Direction ratios are difference between the coordinates of two points,

(x1, y1, z1) = ( -1, -2, 1)

(x2, y2, z2) = ( 2, 3, 4)

dr's' = (x2 - x1) , (y2 - y1), (z2 - z1)

=(−1−2), (−2−3), (1−4)

= (−3, −5, −3)

The direction ratio of the line joining A (2, 3, 4) & B (−1, −2, 1), are ( -3, -5, -3).

A. (-3, -5, -3)

Rakesh answered 1 year ago

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