vectors-m

Question: If the position vectors of three points $A,B$ and $C$ are respectively i + j + k, 2i + 3j – 4k and 7i + 4j + 9k, then the unit vector to the plane containing the triangle $ABC$ is



1) 31i – 18j – 9k
2) $\frac{31i-38j-9 k}{\sqrt{2486}}$
3) $\frac{31i+18j+9k}{\sqrt{2486}}$
4) None of these
Solution: Explanation: No Explanation
Vector Product Cross Product of two vectors

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