Find the length of the vector AB, if A (3; -1; -4), B (7; -4; -5).

univerkov | November 23, 2020 | education

The length of the vector AB is found by the formula:
| AB | = √ [(x2-x1) ^ 2 + (y2-y1) ^ 2 + (z2-z1) ^ 2] here the whole expression under the root
| AB | = √ [4 ^ 2 + (- 3) ^ 2 + (- 1) ^ 2] = √ (16 + 9 + 1) = √26

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