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If $A (1, 2, 3), B (2, 3, 4), C (3, 4, 5), D (4, 5, 6)$ are four points, then the projection of $\bar{B D} on \bar{A C}$ is

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Correct option is B

The vectors BD¯=2i+2j+2k and AC¯=2i+2j+2kThe projection of BD¯ onAC¯ is BD¯⋅AC¯AC¯It implies that BD¯⋅AC¯AC¯=4+4+44+4+4=12=23

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2023 | www.infinitylearn.com

If A1,2,3,B2,3,4,C3,4,5,D4,5,6are four points, then the projection of BD¯ on AC¯ is

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If $A (1, 2, 3), B (2, 3, 4), C (3, 4, 5), D (4, 5, 6)$ are four points, then the projection of $\bar{B D} on \bar{A C}$ is