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Discriminant

The unit vect...

Question

The unit vector along the vector a= 5i^+4j^+√8k^ is

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Solution

/a/=root(5^2+4^2+r(root 8)^2)
=root (25+16+8)
=root 49
=7

unit vector = 1/7 *(5i^+4j^+√8k^)

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