Question

What is the numerical value of 3i^+4j^+5k^

Answer 1

Explanation:

A=3i^+4j^+5k^

|A|=_/(3²+4²+5²)

|A|=_/(9+16+25)=_/25+25=_/50=5_/2

Answer 2

Given : 3i^+4j^+5k^

To Find : numerical value ( magnitude )

Solution:

3i^+4j^+5k^

Numerical value of vector

ai^+bj^+ck^

= √(a² + b² + c²)

Numerical value of vector   means magnitude of vector

numerical value of 3i^+4j^+5k^

= √(3² + 4² + 5²)

=√(9 + 16 + 25)

=√(50)

= √(2 * 5 * 5 )

= 5√2

numerical value of 3i^+4j^+5k^   = 5√2  

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